Jamaica Plain, MA
I wanted to post here and say that even though we haven't had much activity on the local meetup, SproutCore itself is moving strong. We're closing in on a new stable release, v1.10, which will include some great new features like view transitions, as well as some major under-the-hood improvements, manifesting as a reduction in startup time and running memory use of 10-25%!
The core team and interested parties are holding a weekly meeting on IRC, Wednesdays at 11AM (see here for more about getting on that). The IRC channel usually has folks on during the weekdays, and the mailing list is open 24/7!
So if you have any SproutCore questions, hop online and hit us up.