bio fuel friendly engines

Instead of reinventing the wheel, reinvent the fuel. I've been watching several programs about biofuels, anything from algae to corn, so why can't we continue looking into biofuels for our current powerplants. I've seen biofuels in racing, aircraft engines, and even Jay Leno's superstar Jetcar, so what's the deal?
Ken Bethards 02/27/2011
I like the idea of renewables too. But not all of them are equal. Corn needs over 90 gallons of petrolium products to make 100 gallons of ethanol. We need to stay focused on what works and not what helps win the Iowa caucus.