TechCrunch posted yesterday about Grooveshark, a Flex based online music search engine and player. The online player allows you to easily search for music by title, artist or album, and has most (if not all) of my favourite bands on it (your mileage may vary, obviously).

Like many of the commenters at TechCrunch, I really don't understand how this is legal. The site does allow users to purchase the songs in the library DRM free. Users can also upload and share their music with their friends, and if a friend purchases a song that you uploaded, you'll get a cut of the sale.

Regardless of the legal issue, the application is really well done, with a simple UI that works really well.

This would work really well as an AIR application.