Amazon: probably doable if I used the API and programmed an MT plugin, but way overkill.

All Music Guide: ugh. Take a look at the URL when you search. Very geek unfriendly. If they ever allow specifying search terms in the URL, I’m all over it, because the rest of AMG is excellent.

Discogs: another good one, except that they forbid any screen scraping. What I’m doing is more deep-linking, but anyone forbidding screen scraping makes me nervous about deep-linking.

Gracenote: no artist info. Just takes you to a page listing all albums/songs by that artist.

MusicBrainz: excellent site, but the service they provide doesn’t mesh well with what I’m looking for (online database with artist info, album info including cover art, and song info including preview).

MusicMoz: failed the “Gwen Stefani” test.

Rate Your Music: no artist info.

iTunes allows me to easily paste the artist, album, and song (or any combination thereof) into a URL. The interface is user friendly and allows the user to play previews of the songs.

About the only problems are that there’s no Linux version so geeks get all up in a huff, and it’s not WinAmp. Which means Windows geeks get all up in a huff. Two audiences I don’t really care about