“The Open Graph protocol enables any web page to become a rich object in a social graph. For instance, this is used on Facebook to enable any web page to have the same functionality as a Facebook Page.”
#socialsoftware
hueniverse
Best source for information on a lot of open web and identity technologies.
Elgg.org
“powerful, professional social networking.” It’s a social network/community site in a box. LAMP stack. Nice.
Kindling
A new, interesting way of managing/capturing ideas within an organization. Basically an internal Digg for ideas/suggestions.
Lifestream Blog
Blog about HTFS-style streams of information and organization.