Bacterial Fuel Cells

Again, more of a niche market kind of energy product, but something that could really do wonders for the smaller, portable, power needs. But I am curious as to how aggressive this technology can be applied. I mean, if these gene identifications are able to transferred between a wide enough variety of bacteria, I suppose we could use these bacteria to provide boosters within completely unrelated systems that might lead to an overall efficiency improvement drastic enough to bring new technologies to market. Pretty exciting...