Some Ruby on Rails code for enhancing sign-up forms using Google's Social Graph API, inspired by Huffduffer.
A PDF of Dan's slides from RailsConf. Looks like it was an excellent presentation.
From Dan Cederholm and Dan Benjamin: a lovely looking piece of social software all about wine. I've been trying it in pre-release and it's really, really nice. This is my kind of website.
Download the PDF of the slides and play around with the demo from Tim Lucas' recent presentation.