Last time, I posted about a service called as CheckUserNames to check availability of username on various social networking sites. Now here is another new service called as namechk for the same purpose. It checks for availability of username on 72 popular Social Networking sites. You can promote your brand consistently by registering a username that is still available on the majority of the most popular sites.
When you type the user name into the “Chk” search box, it will query all the social sites listed on the page and display whether the username is taken or available.
The site will check user names on sites including blogger, YouTube, Facebook, WordPress, Digg, foursquare, tumblr, Technorati, Picasa, Reddit, delicious and many more.
Link: namechk