http://usernamecheck.com/

[somanyholes]

http://usernamecheck.com/

see where a username is registered. Useful tool, open for misuse though......

[Simon]

Hmm... I have a user name which I use on some forums.  It found five instances of it, none of which were valid!

[somanyholes]

I had one that was the same. I presume it depends how popular your username is ...

[kinmel]

Lots of false positives and 4 false negatives for various alias' that I use.

So cr*p then really

[somanyholes]

4 out of 5 correct on mine

[Steve]

Perhaps being stupid stuck in an email address which I use as a username and got 28 false positives

[somanyholes]

this is proving to be nowhere near as good as originally thought. Strange that mine where nearly bang on correct.. fun fun

[Rik]

It doesn't list IDNetters. 

[vitriol]

or xbox.com

[Rik]

Much less serious.

[vitriol]

Not when it comes to choosing a gamertag, once you choose one then you're stuck with it unless you pay to change it. 

[Rik]

I don't have that problem.

[vitriol]

But currently 15 million others who use Xbox Live do.  More users will join the service aswell at Xmas time, so finding the exact gamertag that you want will not be easy.

[Colin Burns]

i scored and got exactly what i wanted

[Rik]

But aside from that...