No, no ready made units are available yet, and none will be for a little while, as there is far too much testing and stabilising to do. If you bought a unit right now, you'd probably have to hack it and rework it within the next few months. IE, we're not ready for users, just for enthusiastic testers. Have a read of this thread:
viewtopic.php?f=41&t=1699
Getting involved on the cheap = hard work. Nothing is really free. It either costs you time or money or both, in this case, lots of time :-)
Fred.