i just bought a mattress from keetsa (
www.keetsa.com)...it's not 100% green, but one of the best alternatives you'll find for less than a multi-thousand dollar natural organic latex mattress. i believe they use 65-95% recycled or recyclable materials and avoid bleaches and additive chemicals wherever possible, but you can check them out for more details. they ship the mattress compressed in a box to reduce their carbon footprint too, heh.