Find out where your username has already been registered

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UserNameCheck.com is a cool website where you can check whether your desired name is available for registration or is it already in use in a range of social networking sites, right from Blogger.com, Digg, Friendfeed, Youtube, Twitter, Facebook and Last.fm etc

The purpose of the website reads:

“This site is a quick and dirty solution to a question that I often lay awake at night worrying about. Do I have my username registered across every site that I should? What if the next internet humiliation meme just happens to share the username I’ve been using for years, and suddenly people are emailing me asking “hey, is this you ???”. The site is simple. I have a stack of web app urls, the application pings the site using the username you want to check, if it returns a “no user name” error we return that. The site uses Dojo as it does all the checks using Ajax (each check takes a couple of seconds so using Ajax you don’t have to sit and wait 3 minutes for the page to load).”

So check where your username is registered?

(via Lifehacker)