HENDO  I made a desktop app tat does this as well :D  
(Version 1.2)

YULETIDE  You can do this in Quicksilver too, though it slows down your normal use since it has to index all your songs too...  
(Version 1.2)

JWASHMD  This is a great widget. not only will will it play songs.. It is select artists and albums. I am sitting in front of my G5 and say gee I would like to hear some "Chopin"; I type "Chopin" in the window and like snappinng your finger "Chopin" Starts playing. I have over 4000 pieces of music and this is a real asset.  
(Version 1.2)

THEBRIX  Very useful with classical music, which often has long and awkward titles - for example, "beethoven 7" jumps to Beethoven's Seventh Symphony and is a lot easier than navigating and searching in iTunes!  
(Version 1.1)

ANONYMOUS  good little widget!! i surprisingly use it often. keep it up!!  
(Version 1.0.1)

ANONYMOUS  Um, QuickSilver?  
(Version 1.0.1)

MINDQUIRK HIVEBRAIN  The complete instruction manual for Symphonic is located here:

http://www.mindquirk.com/widgets/symphonic/help.htm

There are many hidden features that you would never notice just by looking at it. Please read this before making a feature suggestion, since it may already exist.  
(Version 1.0)

ANONYMOUS  nice idea.

my problems are that:

1) the search is a little on the slow side.

2) it might be nice to have a list of the top 10 results of the search instead of just placing the first result.

also, why make your applescript read-only. i was curious as to whether your script could be sped up but now i'll never know. it isn't like replicating the scipt itself is difficult PLUS i am positive anyone could find a comparative script floating on the web. it seems to me like all you've done is cut off any possible help.  
(Version 1.0)