This is in addition to all the gmail, hotmail, and other mail accounts be hacked lately:

http://beta.serversniff.de/mailaccounts

Not that I agree to the methods but it could be useful to some…

But while we are on that subject:

Some of the methods used here could also be used by the bad boys.

So basically let us assume I do want to attack someone!

It would be a good thing to know then when someone is online, right?

So using defence mechanism the other way around is always fun…