Flying on nothing but fumes and... algae?

Boeing have recently announced that they are promoting the use of algae based fuels in their engines. Or to be more precise they are looking at using algae based energy sources as a means of replacing the worlds reliance on fossil fuels for aviation. The logic behind this is quite simple: Raw algae is fast growing and does not need fresh water. It also doesn't conflict with food quotas (a charge often leveled at biofuels made from corn, for example) This in turn won't drive up the price of food in the short term. With some experts predicting oil will rise to $400 per barrel this makes financial sense.

Of course it is one thing to test a particular fuel in a particular engine on a single flight (as Virgin Atlantic did recently), but in order to make Algae biofuel viable there has to be a supporting infrastructure according to a steering committee of the Algal Biomass Organization, a nonprofit that promotes and advocates for the development of commercially viable transportation fuels.

In order to achieve that viability, Algae-based fuels need a supply chain the committee says, adding such fuels are in the early stages of development. The organization aims to accelerate the development of such power sources.

Over the coming months both Air New Zealand and Continental will make test flights using biofuel in one of the engines, and Virgin Atlantic is hoping a trial can be performed using algae as a biofuel source next year.

How quickly before this filters down to the average Lycoming or Continental engine used in GA...?