An Orkut based virus/worm appears to be on the loose, it propagates by posting notes on people’s scrapbook

http://blogs.securiteam.com/index.php/archives/1049

http://news.yahoo.com/s/pcworld/20071219/tc_pcworld/140653

More references:

Worm on Google's Orkut
http://www.f-secure.com/weblog/archives/00001342.html

Security Reminder
http://en.blog.orkut.com/2007/12/security-reminder.html

<< The orkut team responded quickly, and worked late into the night to fix the underlying issue and contain the spread of these scraps.

We believe that this action has been effectively stopped and you should no longer receive any more of these unintended messages. >>

http://en.blog.orkut.com/2007/12/security-reminder.html

Looks like the worm was stopped and things should be back to normal with the scraps feature.

Same Orkut Blog reference, but thanks for sharing the recent information.