There have been a number of funny memes about how hard it is to create a username for some sites because the one you want is always taken and then you try 10 others and end up with something stupid just because you are frustrated trying to find a username. Namechk will cross check usernames across plenty of sites. It means you then have the chance to dignify username choice because you are not in that pressure situation of trying to come up with a username as you are signing up to a site. Namechk will block out the sites where you cannot use that name and highlight the available sites in green. Easy!