I'm a pretty big fan of Instagram these days, so I'm pretty excited that they've introduced both web profiles (check out mine at Instagram.com/ParkerNow) and badges, like the one below:
For both myself and a lot of my friends, Instagram is pushing Twitter and Facebook aside as a way to see what my friends are up to and sharing. I'm not saying it will replace either, or that it will last forever, but it's fun for now.