I went to a usability workshop on Sunday that was part of NSConference. I found the workshop very useful and it was all very friendly (even to a cross-platform developer with a Windows laptop!) and well organized. There is a US version of the event later this month: http://nsconference.com/
It is more development focussed than business focussed, but I thought it might be of interest to someone. best regards Andy Brice http://www.perfecttableplan.com http://www.successfulsoftware.net Ps/ I am not affiliated in any way.
