There have been recent reports of worms doing the rounds.  The lastest on is on Twitter.

From Ben Parr on the Website http://mashable.com

“We have received multiple reports that a new, convincing, and dangerous worm and phishing scam is making the rounds on Twitter. Hacked accounts are sending DMs to users and stealing their login information. In fact, one of our own has received one of these direct messages.

Unsuspecting users are receiving DMs with the following text:

If you get this DM, DO NOT VISIT THE LINK. It takes you to a replica of the Twitter login page where the hackers will steal your account and use it to send out more infected DMs to your friends.”

For more information go to:  http://mashable.com/2009/09/23/twitter-worm-dms/