Are you on Live Journal? If so you might want to check out their Underground Poetry Project. You can find it by clicking here.
From their page:
The goal is to take poetry to the people. We want to get the words off the page, and into the streets! The rules are simple:
Anonymously post poetry in a public place. Be it on a notecard left in a coffee shop or restaurant, written on a sidewalk, overpass, wall (preferably in a way that won't get you arrested for vandalism) or a spontaneous performance, take a photograph or a videotape or a voice post of the "mission" and share it with the community, then fade away into the day, night, et al. Or simply post a copy of the poem you left behind here in our forum.
Our goal is to take poetry to the people. To celebrate, shout, shine! You have your mission, get moving!