Is Your Username Already Taken

To check if your favorite username is available, go to USERNAMECHECKand enter the username, once you provide the username, the service will check the most popular social networking sites and tell you whether a username is available or not, it also provides you with a link to quickly signup for the service, if the username has not been taken.

So go ahead and see which services you can still sign up for with your favorite username.