Canonical has finally released the first public beta version of Ubuntu 10.04 Lucid Lynx, the first Ubuntu with the new and fresh light theme as shown above.

The new Ubuntu reveals, among other things, a new music shop in partnership with 7digital, which is the Ubuntu One Music Store. This service is not available yet, but once it’s up and running, it will be available in the music player Rhythmbox.

The music shop is also connected to Ubuntu One, a personal cloud you can use to back up, store, sync and share your data with other Ubuntu One users. You get 2 GB of storage for free, and if you need more space, you can get 50 GB for $10 a month.

Ubuntu is also giving you a much better integration of your social networks in this new release. Just by clicking on your user name icon you can change your chat status via Empathy, a chat client that lets you connect to Google Talk, AIM, Yahoo Messenger, ICQ, and others. In addition to this you can “broadcast” short messages through Twitter, Facebook, and other network services.

Here is a video from This Week in Linux that gives you a quick walkthrough of some new features in the beta version.

The final stable version will be released on April 29, 2010. But right now you can download the beta of Ubuntu 10.04 Lucid Lynx here!