Perhaps there could be an open "trouble-shooting and question-asking" session with several experienced "presenters" where the expectation is that the attendees would bring their issues and a database to work against to resolve them. Then let everyone - presenters and attendees - try different options to resolve the problem.

While I realize some problems are complex enough that this might be difficult in some cases, I think it would provide great interaction, plus it would help build presentation skills in those bringing the issues into the session.

Sort of a "grow your own" concept.:-P