Okay, so Hyein and I have been working on our graffiti mail-art project, and have cemented the idea for the stickers. We decided to have people anonymously post what they love on the stickers. Our poster will have the directions/rules for posting. 

The idea is to have small stickers of hopeful or inspiring messages all over the city. Within itself, the project is also a social experiment-- Since we'll be tracking the stickers by placing serial numbers on them, we'll be able to see which group of people (art students vs. non-art students) will be more likely to engage in the project. We're also looking for how many people take stickers but don't use them, or take stickers and use them for personal non-project related use.

We're expecting a certain degree of humor in these-- we're interested in seeing how many pornographic drawings turn up. 

Here's our official project blog that explains the rules:

http://loveitstickit.blogspot.com/

It's still undergoing some maintenance (I'm trying to learn HTML! aghh), but it gets the point across.