While this one doesn't exactly fit into the affordable category, I thought it was a pretty cool concept. The HiLOW table/seat takes the basic form of an ottoman and adds a adjustable table top to it. The inherent flexibility of the design allows it to function easily well as a low end table, a personal desk, or seating. I always love a product that can do more than one thing at a time. Pricing starts at about $300. Available from Kyo Design.