Check your username exists or not in popular sites

Here is the site which can check whether the username you wanted is available or already taken.This site checks all the major sites like gmail, yahoo, digg, delicious, ebay, stumbleupon, youtube etc with more than 50 sites. So if you want a unique username in all the sites first verify from this site the required username is available or not. Having a unique username in all sites makes us easy to remember.
HERE IS THE SITE USERNAMECHECK.COM