Matt, nice follow-up article on the S2. I also got a kick out of your interview with Chiun-Kai Shih. I was assisting/teching on Chunky's latest shoot with the S2 here in Palm Beach just a few days ago. We shot at 320 or 640 ISO the whole shoot, all handheld. Didn't even change a battery until halfway through the second day, after 2500 shots. Chiun-Kai really loves the camera and pushes it as far as he can. He produced some fantastic shots and the S2 performed flawlessly over three days and close to 6000 exposures.
To answer your question, the next lenses to be released are the 24mm f/3.5 and 30mm f/2.8, followed by the 30-90mm f/3.5-5.6 zoom. No specific dates have been given, but I'd expect them to ship later this year. The 30mm is not a T/S, but will be offered in a CS (central shutter) version as well. No word on T/S, although we (Dale Photo) already have a T/S solution in the meantime.
David