The best company for anything art related is ceramicstogo.com
They do tile wall projects which they organise, provide flyers, posters, staff, fire, and their cost (20%) is paid after the school collects the money. They made our school $24,000 in one month!
I know schools in the South Bay are utilizing this, but they'll do it anywhere.

A couple of schools in our area have used Square 1 Art: Square 1 Art - Homepage

They've both said that they were easy to work with, and they were happy with the quality/selection. One did it in the spring as a Mother's Day/Father's Day gift type thing, the other did it before Christmas.

We've used Original Works for two years as a fundraiser for our art program. We were only looking to supplement the small budget given to the art teacher from the district. I handle everything except loading the bags that go home when I get a mom or two to help. We only make about $800 from it but that's a huge help to our teacher.

Thanks Jewel and PTOBrenda. I'll check them out.

Here's another one: Original Works

Aunt Vocus,

I saw the greatest idea. A company that turns the kids artwork into stationery. The are called Artwork for Education. Here is the website. Welcome to Artwork for Education