Excellent way to keep up with your peers. With Web2.0 technologies, you can usually watch the session via online video and still chat with other viewing or attending the session.
Classroom 2.0 is THE resource for teachers and technology.
There are online sessions with PBS hosting important figures in education (link)
Here is a list of online technology presentations (link) and webinars (link)
Conversations.net has online and archived conferences about social media and education (link)
The National Edcuational Computer Conference (NECC) has an online conference too (link)
WeAreTeachers.com has frequent online meetings and archives of past meetings (link)
K12 Online conference
The 2009 conference will be held from December 7 to December 17 (link)
Archived videos and podcasts exist for previous years - 2008, 2007, 2006
Conferences
List of online conferences (link not yet active)