How about a run-what-ya-brung Klipsch shootout? It wouldn't be the easiest task logistically, but if a dozen would-be Pilgrims showed up with some set-ups, DIY or otherwise, it could be a very good time. The layout could be similar to a high-end audio show, with different systems in different locations, minus the snooty attitude and $5000 interconnects.
I wouldn't have anything worthy to bring, but hearing some of the awesome DIY subs and Jube-Corn-Scala what-have-yous we have floating around here would be amazing.
Just an idea.