Yeah, I've got it running in VMWare Fusion and it's pretty nice Love the Facebook integration The birthday reminders are pretty awesome.
I wasn't overly stoked by the preliminary implementation (I'm not much of a microblogger), but after turning on Facebook Contacts, I can see that this will be a great thing for many people. With just a few exceptions Contacts automatically linked contacts I had with my Facebook Friends and propagated all the information - I know other OSes have probably had this feature for a while, but this will make exchanging contact information loads easier. Hope they go the extra step and include a check box for Facebook Chat like they do Google Talk. It'd be nice if they also did Notes syncing over Facebook, but it is the least likely service to get the treatment, since Facebook does not implement theirs over IMAP. They still have 3 months to work on the integration, so I am expecting it to be well done and feature rich.