It is in the final stages of beta, according to posts by Jon. It is quite stable but somewhat different than was discribed early this summer. There is no practice management, that will be saved for "version 5" as we found there were more things that needed to be done at the ACUC.
Mostly version 4 is a conversion to SQL database which is faster and fairly stable. Look at some of the other posts. There are some other advantages as well.
