I wrote about XDegrees, a cool little start-up in Mt. View that built a p2p extended DNS system, many months ago (after following them since their initial funding). While the p2p market burst with the rest of the bubble, XDegrees was able to sell their technology to MSFT. Looks like it's going to be integrated with .NET, according to this News.com article:

http://news.com.com/2100-1001-957929.html?tag=fd_top