It sounds like Mashup Camp was a hive of very productive activity. Kevin Lawver gave a presentation on portable social networks but instead of just talking about it, he wrote some Ruby code. Kevin is using OpenID for log in, followed by hCard parsing and XFN spidering (see also: Gavin Bell’s work). Superb stuff!
And just in case you think that this is still a niche geek thing, here are the job details for Program Manager of Internet Explorer over at Microsoft:
Does the idea of redefining the role of the Internet browser appeal to you? Do the terms HTTP, RSS, Microformats, and OpenID, excite you? If so, then this just might be the opportunity for you.