web2.0 services have increased in huge numbers and trying to have the same username across all services or social networks can be difficult,If you have the same username across different web services then it becomes easy for others to identify you across different social networks. UserNameCheck is another such web2.0 service that lets you check your choice of username for availability across 60+ web2.0 sites at a time.

Check if a username of your choice is avialable on a social network @ UserNameCheck