I don't know David, I don't think there was all that much pressure from active users to move AC along to a MU version. I remember a lot of posts asking that the known bugs be fixed first. I remember a lot of posts by users saying that they weren't going to bother with MU. I suspect that AC itself launched into CCHIT and then MU, based on what the rest of the EMR industry was hyping.The advent of MU allowed the lousy EMRs to gain on the useable EMRs (like AC) by promising the $44K payoff. What a sad comment on the whole EHR phase in. Companies like AC will be forced to make revisions at the same breathless pace to keep up with the next set of MU requirements. As we have already seen, usability suffers.