We all have that one favorite username that we use across all of our social networks, so what happens when you realize your name is taken? The horror! Before you endure the painstaking task of typing send to see if your username is available, there's a site called namechk that will do the grunt work for you. When I saw this site on Mashable, I literally had an ah-ha moment, since I now know what sites I'll have to use alternate names for. Just type in your preferred name and namechk will reveal what sites you can still sign up for — with your awesome username.