Oh! It's very fun. During the sshg/exchange a group of fangirls run the exchange bingo. Participants 'buy' cards by offering prizes like a drabble or short story or even crafts or foods like cookies and stuff. The rules are all explained on the site http://exchange-bingo.livejournal.com/profile. But that comes with the exchange itself. Last year I won a drabble from devsgma, and a book and pod fics from teddyradiator

This, though, is some bit of fun they have cooked up regarding the prompting which opens tomorrow. explanation, here: http://exchange-bingo.livejournal.com/27481.html

And apparently they are adding to the frenzy by trying to have a bit of house competition. Being a longtime Puff, myself, I was just promoting them. But if you decide to sign up you can designate whatever house you choose, apparently even sparkly poo! LOL!