Here's the word from their website:
The fifth annual gathering of the Netroots will be held July 22–25 at the Rio Hotel & Casino in Las Vegas. Netroots Nation 2010 will include panels led by national and international experts; identity, issue and regional caucuses; prominent political, issue and policy-oriented speakers; a progressive film screening series; and the most concentrated gathering of progressive bloggers to date.
Ben will be speaking at the "Getting to We.Gov: How To Leverage the Open Government Movement For Social Change" panel on Friday afternoon. Click here to learn more about the panel and the panelists, and to see Ben's silliest event-bio to date.