Nomad,
I have used the SeaFoam in my bike occasionally (I have been putting the red Sta-Bil additive in my tank regularly all winter at fill-ups) .
I had read good things on this forum about Seafoam use as: a fuel additive, a way to free up stuck pistons, and even one member giving me tips on clutch issues recommended it for use in the oil to clean the clutch plates.
I'm usually pretty skeptical about miracle 'snake oil' products, but based on the educated suggestions from forum members, this stuff seems to be the real deal. Just not sure if it addresses the concerns for Ethanol.
In doing some quick research, it seems a lot of the info on the web is aimed at marine/boat owners. A couple other names I found addressing Ethanol concerns are: Startron and Soltron.
I have to admit that I have been acting on 2 parts trust, 1 part laziness with this issue. Or maybe it's the other way around
I guess I have been hoping that if I am not getting excessive gunk in my carbs, and bad acting engine performance, that maybe these additives I have tried are actually working.
I'd love to hear more definitive answers though...