Biofuel: corn ethanol? switch grass? algae?

Here's the beginning of a great article on cellulosic ethanol from Gristmill:

"When it comes to biofuels we have choices. We can do it poorly, using short-run approaches with no potential to scale, poor trajectory, and adverse environmental impact. Or we can do it right, with sustainable, long-term solutions that can meet both our biofuel needs and our environmental needs.

We do need strong regulation to ensure against land-use abuses. I have suggested that each cellulosic facility be individually certified with a LEEDS-like "CLAW" rating, and that countries which allow environmentally sensitive lands to be encroached be disqualified from CLAW-rated fuel markets.

We think a good fuel has to meet the CLAW requirements:

C -- COST below gasoline
L -- low to no additional LAND use; benefits for using degraded land to restore biodiversity and organic material
A -- AIR quality improvements, i.e. low carbon emissions
W -- limited WATER use.

Cellulosic ethanol (and cellulosic biofuels at large) can meet these requirements.

Environmentally, cellulosic ethanol can reduce emissions on a per-mile driven basis by 75-85% with limited water usage for process and feedstock, as illustrated later. Range, Coskata, and others currently have small-scale pilots projecting 75% less water use than corn ethanol, with energy in/out ratio between 7-10 EROI (though we consider this a less important variable than carbon emissions per mile driven)." (Vinod Khosla, Gristmill, January 29, 2008)

Have you ever listened to David Blume or seen his website?  I have a link at www.poorfarmgreen.blogspot.com