> What is the revenue stream?

None yet... I'll figure that out if enough people find it useful. Probably along the lines of selling virtual and physical merchandise with Bumblies on them. Physical postcards are a real possibility - I'll probably ask Brezina if he'll do a Sincerely deal with a web app. I'd like to avoid advertising and keep the site clean and fast.

Quickmeme has ridiculous traffic, and Memegenerator and Memebase aren't far behind. I wanted Bumbly to have a more sophisticated tone, and hopefully appeal to the female / BlueMountainArts / Pinterest crowd.