http://livebloglist.com/

Here is a list of other people interested in new.yc:

http://livebloglist.com/list/?url=http%3A%2F%2Fnews.ycombina...

Would be great if I could put in my FF username and it would filter out the people I'm already friends with.

http://friendfeed.com/ruby

Here's a tool I wrote for importing your Twitter contacts into friendfeed: http://internetducttape.com/2008/04/21/import-twitter-to-fri...

Here's a ton of greasemonkey scripts I've written for Friend Feed:

http://internetducttape.com/tools/#friendfeed

The only service aggregated by FriendFeed that I currently use regularly is Twitter, so you might as well go to

http://twitter.com/michaelhartl