WERTY  Doesn't work with me (10.6.1), this is the error I get opening safari with the plugin installed:

"SIMBL ERROR

Safari 4.0.3 (v6531.9) has not been tested with the plugin Keywurl (null) (v1.4.0). As a precaution, it has not been loaded. Please contact the plugin developer (not the SIMBL author) for further information."  
(Version 1.4b7)

SJK  Workaround for SIMBL error with Keywurl 1.4b6 and Safari 4.0.3:

Change MaxBundleVersion from 5530 to 5531 in /Library/Application Support/SIMBL/Plugins/Keywurl.bundle/Contents/Info.plist  
(Version 1.4b6)

SJK  This may be of interest at least to some former Sogudi users:

Keywurl's default shortcut overrides Safari's domain auto-matching on domainless entries in the location field. For example, entering mumble- (if there are no Top Hit, History, or Bookmark matches) uses Keywurl's default shortcut (e.g. a Google search for mumble) instead of trying to resolve mumble.com (at least). This is why I preferred Sogudi's simple method of prepending Space to invoke its default shortcut. For now my workaround is to disable Keywurl's default shortcut and assign a single '.' as a Google search shortcut. This gives Safari's domain auto-matching priority over Keywurl for handling non-shortcuts in the location field. Being used to Sogudi's behavior made it bothersome typing single words I anticipated would be handled by Safari instead of Keywurl's default shortcut.  
(Version 1.4b6)

BERTOBOX  Thanks for the update! I love Keywurl!! :)  
(Version 1.4b6)

GCOGHILL  The new beta 5 version generates an error for me with Safari 4 final. Sees Keywurl as v 1.4.0 and gives the warning window upon launch that it hasn't been loaded.  
(Version 1.4b5)

GCOGHILL  Just a heads up that the current version is not compatible with Safari 4 final. The dev is pretty responsive to updates so I am sure it will be updated shortly.  
(Version 1.4b3)

UNCOY  Superb free plugin. Makes Safari a joy to use. I've been using it for months.

Really improves browsing experience. Stays out of your way.

Something similar in Safari Stand which I've just started using for the highlighted source code.  
(Version 1.4b3)

ALUAKZ  simply amazing! neat, simple, and useful... i used to be on sogudi ages ago, but after getting a new macbook, i couldn't manage to get it installed on leopard. i've tried inquisitor, which was nice but too cluttered. it doesn't do search from the address bar, but in the search bar. i could never get safarisia installed. but this little pluglin in a beauty! finally i can go back to searching through address bar without getting my hands off the keyboard. thank you!  
(Version 1.4b3)

SW_TESTER  you have to go to the DEVs site to DL the Safari 3 version.

what is Keywurl running a backup of the keyword.plist every 2 minutes?

way overkill. maybe backup only on quit?

check your console log to see backup activity.  
(Version 1.4b3)

GCOGHILL  Must have plugin for Safari.

Developer also released a Safari 4 version lightning quick.  
(Version 1.4b3)

ANDREW SCOTT  Sadly Keywurl seems to conflict with Safari 3.2.

What a pity, I really miss it.  
(Version 1.4b2)

STEVEN GOODHEART  Keywurl is awesome!

I use it dozens of times of day with Safari 3.1.2 and OS X 10.5.4. (Couldn't get Sogudi to work well with my set-up.) Btw, my all-time Safari add-on, SafariStand, does keywords too, but I like Keywurl's interface better.)

Setting it up is so simple and easy because of the great interface.

Here are some fave searchess -- you can, of course, give your own keywords. For example, I use wk for Wikipedia searches.

(Where you see "Query" below, is where Keywurl puts in its Query lozenge (it seems to automatically put in the commas where needed before and after the Query lozenge, because when you look at the expansion in Keywurl you don't see commas, but when I copied and pasted here, the commas where correctly inserted.)

Anyway, Keywurl is awesome, and this might help you get started:

All Music

http://allmusic.com/cg/amg.dll?P=amg&sql=,Query,&opt1=1

Amazon Search:

http://www.amazon.com/exec/obidos/search-handle-url/index%3Dblended%26field-keywords%3D,Query

Discogs

http://www.discogs.com/search?type=all&q=,Query

Flickr

http://flickr.com/photos/tags/,Query

Google Search:

http://www.google.com/search?q=,Query,&ie=UTF-8&oe=UTF-8

Google Image Search:

http://images.google.com/images?q=,Query,&ie=UTF-8&oe=UTF-8

Google Maps

http://maps.google.com/maps?oi=map&q=,Query

Internet Movie Database (IMDB)

http://imdb.com/find?s=all&q=,Query

MacUpdate

http://www.macupdate.com/search.php?keywords=,Query,&starget=google

VersionTracker

http://www.versiontracker.com/php/qs.php?mode=basic&action=search&str=,Query,&srchArea=macosx&submit=Go

Wikipedia

http://en.wikipedia.org/wiki/Special:Search?search=,Query,&go=Go

YouTube

http://youtube.com/results?search_query=,Query

Of course, you can also use Keywurl to just open any website you want with a keyword -- for example, I type gn to open Google News. To add other searches, go the site your interested in, do a search there, and then copy the url into Keywurl, replacing your search keyword with one or more of Keywurl/s Search lozenges,as needed. With a little luck and experimentation, you can set up searchs at almost any web site.

(You can use these Searches in SafariStand too, but there, as I recall, SafariStand uses @key& for its keyword Search field, not a graphic lozenge like Keywurl does.)

Good luck!  
(Version 1.4b2)

GCOGHILL  After I installed PlugSuit, Keywurl no longer works. Other plugins for Safari are fine. Any ideas of what could be wrong?  
(Version 1.4b2)

ANDREWA121  Looks like a good program. I'm just wondering what distinguishes it from Sogudi.  
(Version 1.4b2)

HANS66  The installer requires OS X 10.5. But the System Requirements says: Safari 3.0 and Mac OS X 10.4 or later?? I'm using Safari 3.1 on OS 10.4.11.  
(Version 1.4b2)

FAHLMAN  I missed this little gem when I was using the beta of Safari 3.1. I'm so glad it's back again!  
(Version 1.3.3)

STEVEN GOODHEART  Alright! The 1.3.3 update makes Keywurl compatible with the new Safari 3.1 update! Next day fix -- not too shabby (not as fast as SafariStand or Saft updates, which came out the same day as the new Safari, but not bad!) Glad to have this great little add-on back.  
(Version 1.3.3)

TOMDOHERTY  Does NOT work with my Safari 3.1, I got this error message - "Safari 3.1 (v4525.13) has not been tested with the plugin Keywurl (null) (vKEYWURL_VERSION). As a precaution, it has not been loaded. Please contact the plugin developer (not the SIMBL author) for further information."  
(Version 1.3.3)

GARYS  I love this little app. I've been an Opera user for many years. My favorite feature of Opera has been the ability to use the f2 key as a shortcut and search trigger. Keywurl allows me do get the similar functionality in Safari. I don't think I'll be leaving Opera any time soon, but this closes the gap for me a little.   
(Version 1.3.1)

GORDON142  This version just gives me the following error when Safari launches:

"Failed to load the Keywurl plugin.

*** -[NSCFNumber objectForKey:]: unrecognized selector sent to instance 0x214450"  
(Version 1.3.1)

ANDREW SCOTT  Very nice, useful software. I think it needs a bit more by way of a help file though. I tried creating a search for MacUpdate:

http://www.macupdate.com/search.php?arch=all&keywords=@@@&os=macosx

It works well except I can't get the keyword to stick in the Preferences file (I had to replace the expansion string for discogs). Maybe it's a bug or maybe I just can't work it out.  
(Version 1.3)