• PHSWichitaOpen.com Preferred Health Systems Wichita Open Golf Tournament part of the Nationwide Tour Wichita, KS August 3-9
•  International CES, Las Vegas, NV Jan 8-11.  Entries tagged #ces09 at @CES09.
• Chicago Twitter Party Party organized via Twitter during Looptopia festival May 11
• Mix '07, Las Vegas, NV
• Web 2.0 Expo, San Francisco, CA
• Etech Conference, San Diego, CA
• BarCamp LA (event page), Los Angeles, CA
• 3GSM Conference
• Macworld, San Francisco, CA
• Festmob -- There's a bunch of folks Twittering from the front lines of the Sundance Film Festival
• YearlyKos Convention -- progressive political blogger convention in Chicago in July 2007
• Twitter Developer Nest The event bringing together the growing community of Twitter developers, UK

General

• BarCamp (event page)
• Web Monday (event page) -- Web Monday connects the internet startup scene in and around Germany (with additional meetings taking place in Austria, Silicon Valley as well as on Second Life).

Calendar Plug-In

• Event Promoter? Add a calendar entry on your Twitter-related event.
• Event Attendee? For event details, click on each calendar entry.