Michael Dell spoke at Fortune's Brainstorm:Green conference today, and he took the wraps off this funky bamboo-encased eco-PC concept. Said to be Dell's smallest-ever computer, the machine is 81 percent smaller than a standard desktop and uses 70 percent less power. There's no word on what's inside yet, but Dell says the machine is due to be released later this year, and should cost between $500 and $700. Hit the read link for a couple more shots, and check out a render after the break.