As excited as I am for SMTs (and believe me, I am and am involved in a couple of projects poised to jump on that opportunity), they really need to fix their front-end first. I don't have an issue with switching to Busy, but what about the multitude of users that have no clue Busy exists?
It wouldn't take much time or effort to take a week off from SMTs to focus on the UI and fixing the front-end to at least make it usable.