For those wondering what SUP is: http://www.webmonkey.com/blog/What_s_SUP_:_FriendFeed_s_Mode...

Also see http://code.google.com/p/simpleupdateprotocol/

Frittr is the example usage, and http://sup.appjet.net is the raw implementation.

It's cool to see a big name for once.

Actually, http://sup.appjet.net was part of an earlier, unfinished project. http://frittr.appjet.net/ is complete and standalone. I just changed sup.appjet.net to redirect to frittr.appjet.net since there's really nothing at sup.appjet.net.

I'm glad that you like frittr though :)