ZO219  Excellent quick app launcher with a memory. Faster than Launchbar, and unlike Spotlight, I can make a typo and it still works.   
(Version 2.0.0.1447)

HOTFREAKS  Crashes instantly upon use. Impressive.  
(Version 2.0.0.1447)

E_COMMERCE  An excellent product, but fatally flawed in one simple way - how asinine is it that when launched on login it opens the search box? When I boot my computer, I don't want to see the search box unbidden.  
(Version 2.0.0.1447)

ROBOTANK  Very nice. It's not nearly as versatile and QuickSilver and Launchbar for local operations, but it excels with its web page and search suggestions. It also has some other nice little touches, like displaying dictionary definitions in the search box or in large type. For me, QSB won't replace LaunchBar (especially since I already paid for the version 5 upgrade), but I will use it for certain functions it performs better.  
(Version 2.0.0.1447)

PROSPERO  Looks very promising. Until now I used LB and was about to pay the upgrade fee. Now I hesitate as I think QSB has quite some potential. Lets see how the plugins roll in ... Could very well be the next QS. In contrary to the reviewer before I don´t think that the interface is ugly ... it´s reduced to what you need ... nothing more and nothing less ....  
(Version 2.0.0.1447)

ZX  Nice start. but got the usual horrible Google design...  
(Version 2.0.0.1447)

HEEPFAN  Brilliant! Far less complex than QuickSilver but does a great deal. Would be nice to have triggers that would search only a certain context but I will use this frequently. Plug-in support will make this HUGE. Probably not my favorite way to search the web but I prefer this to Spotlight for finding apps and documents on my hard drive. Everyone should give it a try.  
(Version 2.0.0.1447)