High gas prices have people doing lots of interesting things to improve their fuel economy. This takes the cake.
On the other hand, I have read more about hydroxy boosters, and the innovation never stops. There is a lot of experimentation with cell sizes, shapes, and configurations. Sodium hydroxide and potassium hydroxide concentrations are another experimental variable. I wish there was an exhaustive wiki on the topic, because the knowledge being passed around in the email lists is not being recorded in a compendium anywhere. Competing designs are being tested in bake-off style road rallies with the results posted on YouTube by a guy known as Smack (aka Electrik).