Final project participation

So, I'm looking for some input here, so please post comments if you have ideas for me. I'm preparing to put my final project into motion, and I'm stressing a little about whether it is going to work or not.

Particularly after our exploration of blogs, I was really impressed at how much creativity this medium inspired in the "average person." It really is a big thing to publish, if only annonymously. My first reaction to blogs was very positive, mostly based on their function as a facilitator of creativity.

Of course, the second impression was not quite as positive. I began to be aware of the incestous nature of hyperlinking and commenting as the primary forms of "community." It is a good thing that conversation can exist in electronic media, but I would like to see it go beyond that world. There is great potential in the connections that online media can create, but I think that they miss a great opportunity in not reconnecting to the outside world that inspired their posts.

With this as my inspiration, I set out to create a final project that could use an online community to facilitate creativity in the real world. I have a website that I will be making availible soon that will track two "creative spaces" on Pomona's campus. One will be a notebook for people to write in, and the other will be a space marked on the ground for people to do nature art in. The idea is to track both of these spaces on the website (with transcriptions of the text and photos of the "canvas", and to ask people to create in the physical spaces. The website should track a conversation between two different spaces and two different media, but the "input devices" will be located out in the world.

I would love thoughts on the project itself (apologies if my explanation is unclear), so please post those. However, my primary concern is getting people to participate in this. I probably need 4 or so people to take time to work on this each day for a week, and I want the process to be as organic as possible. I think I can do some "advertising" on the blog and by word of mouth, but I am shying away from using the digester or (heaven forbid) creating a facebook event. Am I right to avoid advertising, or is this part of public art? Anyone have good ideas on how to get people involved without exercising any more control over this project than I have to?