Grabs any arbitrary Twitter users' favorites (provided you've permissions to do so) and returns an URL suitable for feeding to TwitterFeed.com. THEN you can re-post your favorite tweets to your own stream! Read more at: http://soldierant.net/archives/2008/03/fun_hack_retweet_you.html
NB: this pipe filters out entries originating from YOU, the requestor. (I did this to avoid re-tweeting to my stream.) If you don't want this behavior, clone the Pipe and remove the 'filter' module.
Pipe Web Address: http://pipes.yahoo.com/bryce/feedyourfavorites