I found out about ProfileFly by finding this article while doing more research on Profilactic. Finding two different sites within minutes of each other made for an interesting experience.
At first glance, I was more impressed with ProfileFly. But after creating an account, I was much less so. The worst part: Listing the sites you can create a profile for and then forcing you to input the entire url for each one. They should really take a look at how some of the other sites make use of the username whenever possible.