Here is
a cool Yahoo Pipe that I just finished building. It loops trough all of your Twitter
friends, loads up their blogs and then returns the latest items from their blog's
RSS feed.
Essentially this allows you to subscribe to all of your Twitter friend's blogs without actually adding all of their feeds to your reader. Just add the feed for this pipe: http://pipes.yahoo.com/spaetzel/twitterfriends
It does take a long time to run the first time, but the results are very useful.
I have been spending a lot of time playing with Yahoo Pipes, you can see some more pipes that I have created here: http://pipes.yahoo.com/spaetzel/. I'll blog about more of them soon.