I'm pretty excited about hearing Onezumi Hartstein's news – she and webcomic web-guy Harknell have organized a new convention called Intervention: Your Online Life, In Person. A Convention with Webcomics, Videos, Music, and You. It looks very cool, very webcomic-friendly but also firmly rooted in online, not comic book.
Intervention is about bringing together the people you read, watch, listen to, and connect with all in one location to party, educate, and appreciate the opportunities the Internet gives all of us.
The only wrinkle is that it's on the same weekend (September 10-12) as SPX which has become quite a webcomic-friendly forum too. They are in the same general suburban area though (northish of Washington DC) so maybe a lot of people will do both this year (FLEEN seems to think this is possible) — I think it would be well worth it for you to try.
The early guest list is starting off well, in addition to Onezumi and Harknell, there'll be an edition of Super Art Fight and these webcomic dudes: