Thumbplay has released it's mobile music service in public beta, and it's no longer just "invitation only".
This app is available for download on Blackberry App World, allowing users on-demand access to millions of tracks. It also allows user to build their own collections of favorites, generate playlists, run searches using specific keywords, import iTunes using a companion desktop app, and listen to music both online and offline.
The service now will work on BlackBerry's 8900, 9000, 9530, 9550, 9630, and 9700.
You get a Free, three-day trial for all users; after that, $9.99/month