Xen -testing (2.1) and Xen -unstable (3.0) are both quite stable on my local development box. However, I've been struggling with a problem in both of those on another test machine. Check out this thread:
http://lists.xensource.com/archives/htm ... html#00161
I'm hoping that it's nearing resolution. Once it is resolved and I acquire more cage space at the datacenter, I can continue with the public beta. For production. we're either going to be using 2.1 or possibly the pre-3.0 stuff. We'll just have to see how things go during the beta testing.
-Chris