Nowadayas, User-bars are so populer among teens. User-Bars are small grafics for forum signature, which help them to show a tiny bit of their personality in an attractive way. I am what my brand is...
For example, if you love adidas and you are keen coke drinker, you can use them as your forum signature
i think user-bars are very inspireing for brands to help people self-express themselves with brands. There is huge opportunities
here is a link to userbars.com