Nothing on a social website gets old faster than looking at the default avatar. That's the square graphic meant to represent a user who hasn't uploaded a photo. There's nothing to be done about this, right? Think again: there's an API that can give all your users a unique graphic.
Retro Avatar is an incredible easy API to use (see our Retro Avatar API profile). All you need to do is put in a URL some text for the service to use as a seed to create the graphic, which will look like something from Atari video games (hence, retro).
What should you use to seed the avatar? An email address or a username will be able to ensure that every user will have a unique avatar. And that's what we're after here, right? Death to the default avatar.