Deezer is a completely web based music service that was launched in France back in 2007. Deezer is quite similar to services like Spotify and Wimp, where the user pays a monthly fee and will be able to listen to unlimited music from Deezer’s catalog of 13 million songs.
Spotify’s “unprecedented” popularity justified the deal.
We don't know when, but expect it soon.
If this feature releases, I'll be the first person to disable it.