ALERT:
Reports are coming in fast and furious across the Twitterverse that hundreds (probably thousands by now) of tweets are going out about TwitViewer.net. The tweets are telling you to sign up and find out who the last 200 people to view your Twitter account are.
DON’T DO IT! Giving you user name/password to third party sites is very risky. It’s usually best to wait until positive recommendations come from them and the site has been around a long time without any problems. In this case, TwitViewer.net seems to have registered the domain name today which is a sign that something is odd. Most companies register the domain name way before they actually launch their product.
Now maybe it’s just a coincidence, but I would recommend being safe rather than sorry. Now if you fell for it and registered, change your password NOW.