The NSS International Space Development Conference (ISDC) will be this May 18-22 at the Von Braun Center and Embassy Suites Hotel and Spa in Huntsville, Alabama. You can keep tabs on announcements regarding the ISDC via the following social media outlets:
Twitter (short messages and updates)
http://twitter.com/ISDC
Facebook (longer messages and pictures)
http://www.facebook.com/NSSISDC
LinkedIn (broadcasting to a professional audience)
http://www.linkedin.com/groups/2011-International-Space-Development-Conference-3844843?mostPopular=&gid=3844843
Cafepress.com (for merchandise sales)
http://www.cafepress.com/dd/53083292
And, of course, the main ISDC website:
isdc2011.nss.org