It looks like Chris Pirillo's Gnomedex conference will take place at the end of August in Seattle again this year (the best time of year in this part of the world). I hope to be able to go—I participated but could not attend in 2007. Chris makes an interesting point in his post about how:
Positive or negative, Twitter fuels groupthink. [...] Handling 350+ special interest groups simultaneously when they have a direct line to the rest of the world is a completely new challenge.
Gnomedex is an unusual tech conference. It's smaller and less expensive than most, more broad-ranging, yet it attracts a more hard-core techie crowd than, say, Northern Voice here in Vancouver. Gnomedex has a different vibe every year, driven by whatever currents are pushing the web community at the time. Despite my absence last summer, I felt something a little off in 2007 from reports—perhaps in part because of a disconnect between that Twitter groupthink and the structure of the meeting.