Created a quick userscript today to strip out header and footer (and a few other things) on twitter.com. The need was to be able to TAB to the link in a tweet super quickly after opening the message page (for exemple from NetNewsWire where I subscribe to favorites as RSS feeds for some users).
I think of it as Readability for Tweets. You can find it at http://userscripts.org/scripts/show/86177
A Frog in the Valley 