I love bamboo also. The feel is so soft, the quilt drapes beautifully, etc. I try tofind the bamboo/cottn blend on sale. I also have a bamboo/cotton fabric on bolts from Joann's. It too is soft and drapeable and silky feeling.
As to the environmental issue, it is probably no more nor less friendly, than manufacturing poly (chemical product) or spraying cotton for pests.