I really, really want these hanging over each table at my wedding. I think that it will add a complete ambiance to the room. I will make mine myself, but if you are wanting to do this and don't want to do them yourself, check out the many shops on Etsy that have made a hobby to provide you with cute tissue paper poms, such as this one.
If you want to make them yourself, check out Martha Stewart Weddings for the how to: http://www.marthastewartweddings.com/article/pom-poms-and-luminarias
and find all your tissue paper needs here. They are only $35.00 for a pack of 240. If you need less, there's plenty of tissue paper elsewhere, also.