From what Claire has told me, "immediate release" is getting 6.5 to beta by the end of the month. Then they would go to general release in February.
I have been using GatewayEDI as a vendor for years before I got into AC. I was hoping to continue using them. Problem is, AC does not even output claims files correctly so that they can use them. Only a few vendors know how to use AC's oddball files. A friend is working on a converter so I can send my claims to Gateway. No help from AC, of course.
If this doesn't work, Practice Fusion is going look more and more inviting.
Too bad, though, as I really like the idea of a small company doing a great job.