I found some orkut-specific Greasemonkey scripts today. I've only tried two scripts so far - the Scrapbook & Album viewer and the My Scrabook Link
gyaan: greasemonkey is an extension for the firefox browser that allows one to modify the behaviour of websites. For instance, by using this script, here's how my visit to dilbert.com looks:
that's right - no pesky ads!
You can find more nifty scripts at www.userscripts.org