Seems to me that we (52) beat the attendee number (35) at the NetBeans Platform training at Southern Illinois University recently, though that looked unbeatable at the time:
Many more cool pics from the Poznan training (which started yesterday and ended today) here.
And, maybe your university/college/whatever would like to beat the record set at Poznan? Not only that, but you'd end up learning how you can create apps on the world's only modular Swing application framework. Nothing simpler. Read all about it here!