Using ruby-on-rails to implement a OAuth consumer or service provider. (Talk I attended at the Web 2.0 Expo.) (tags: web2.0 rubyonrails ruby security)
Some Slidesets from the Web 2.0 Expo (tags: web2.0)
http://en.oreilly.com/webexsf2008/public/schedule/proceedings (tags: web2.0 conference)