Designs made from pallets are a staple of TreeHugger; they are cheap and ubiquitous. British designer Sarah Williams shows how she made this lovely table and four chairs from pallets, every step of the way. I like the table design with the space under the glass. I like the view too; too bad it's photoshop. Get more detailed instructions and material list at Bridgman, a furniture manufacturer that had a lot of pallets hanging around their office.
Remember that pallets can be dirty and buggy; look for heat treated ones and keep away from food service pallets.