I wrote a script today called wacleanup. It’s a Greasemonkey script, and it will also work natively in Google Chrome too. The script is for Wolfram|Alpha and will remove the crap around the edges of the page, leaving nothing but the valuable information in the middle. This script will remove the background images, example links, header, footer, social stuff, side bar… Pretty much everything except the search bar and the results.
Script it maintained here.
Here is Wolfram|Alpha, with wacleanup running: