According to the Boxee Blog the new partnership will offer
A Huge Collection, Past and Present
Grooveshark’s catalogue won’t leave you wanting. Access millions of songs from every genre, from Rock to Classical to Electronic to Folk.
Check Out What’s Popular
The Grooveshark Popular List lets you check out what’s hot at the moment. Keep up with music trends and new tracks without being bombarded by ads (a la commercial radio).
Curate Your Music Library
You don’t have to dig through the mountains of music available every time you build a new playlist. Grooveshark makes it easy for you to build your own personal library. If you see something you like you can add it to your library with just 2 clicks. Then access your library from anywhere you want. Even on your mobile devices.
Create and save playlists in the app, or any browser, then access them from anywhere.
The app is free to try for a few weeks, after the trial period Grooveshark is $9 a month for all the music you can stream on Boxee, your phone, and your computer. Once you’ve got an account – your playlists and music library are loaded up no matter what device you use.
To celebrate the launch boxee has partnered with Grooveshark to give away free Grooveshark premium accounts and 5 Boxee Boxes – head over to http://boxee.grooveshark.com/ to enter.