I'm afraid I've not put in enough time to check how thoroughly compatible it is. I tried the last RC before the official release (just out) and it LOOKED good - no complaints, it did what it was meant to in the quickest of tests. But it was not what I'd call thorough.
If more user ratings pile up YES, I'll mark it as officially compatible in a couple of weeks -- why not, that's beta testing for you!
I have a small backlog of requested tweaks (strict mode, permission changes) that I've been meaning to implement and just not had the time either :-( and ideally I'd do that with a minor update release and official 3.0 compatibility.
Now to see about upgrading our live site to 3.0...