Some people are liking the UI here, but it wasn't clear to me at first that a [+] meant the username was used on that site. In my mind, it could just as easily

Some people are liking the UI here, but it wasn't clear to me at first that a [+] meant the username was used on that site. In my mind, it could just as easily mean that it's available on that site (that could be a positive result if you're looking for places to sign up with a name). This should be made more clear. It would be interesting if you could toggle on the not-found list as part of the results. If you get a big positive list, but you'd like to find the sites where the username is not in use yet, there's no quick way to get that info. (Yes you could scrape both lists and use some simple command line scripts to get those results, but it's such a simple thing to add to this tool)