Digi-Key announced the BeagleBoard. Since then, BeagleBoard-xM was launched and numerous other distributors have also signed up to deliver the BeagleBoard and BeagleBoard-xM all around the world.
Linux is turning 20 years old this year and Linus has released version 3.0. You can try 3.0 out on the BeagleBoard or BeagleBoard-xM prior to rev C and it should work for you pretty well. Support for xM rev C was merged after the 3.0 release for inclusion in 3.1. If you'd like to pull a patch set that gives you power management, 1GHz support and some other features not yet placed into the mainline yet, you can check out the patch set in the meta-texasinstruments OE repository. Koen also has also released a set of pre-build binaries and modules using these kernel patches if you want to try out a fairly full-featured 3.0 kernel build for the BeagleBoard/BeagleBoard-xM.
I haven't tried it out yet, but the Linaro 11.06 Android evaluation build also includes a 3.0 kernel for your BeagleBoard-xM.
Happy Beagle 3.0!!!!