Do you Twitter? Be careful with those emails you get from them. Apparently the not so nice guys are phishing for Twitter accounts. The emails resemble those that Twitter sends you when you get a direct message. I actually received one of these a couple of days ago, but did not sign in on their site because I have my trusty Twitter Toolbar that I created a while back. Using any of the Twitter widgets or softwares like the Twitter Toolbar should help defend against this kind of attack.
If you did get tricked, or would like more details on how to prevent it, here are the details: Gone Phishing for Twitter Accounts.
Download the Twitter Toolbar for Firefox, Version 1.08