[Cynette]

I'd start by looking at the trade show trinket companies. They offer them in a variety of shapes and sizes. I don't think they would load the data on them but that will give you an idea of the starting costs. I have a cute one at home that was imbeded in a bracelet and contained the product catalog for the company that gave them out.

Here is a sample company (no endorsement, it was just the first one I found)... looks like they will even load the data for you! http://www.printusb.com/index.html