If digital identities are of interest to you, so should this quick screencast by Kim Cameron demo'ing Infocard - it's worth a download.
Choose the second file to download (the 2.5 MB size file).
"As a taste of upcoming MIX06 sessions, Kim Cameron presents a thumbnail sketch of how InfoCards bring an architecture for identity to the Internet, a demo of how it works and a peek at how you integrate it into a Web page. See Kim's full session on this topic at the MIX06 conference. "
Attention and Identity Podcast with Kim Cameron and Dick Hardt