At least they said the JH-5M's "produce far and away the best sound of any IEM's we've tested." - even if it doesn't block/drown out enough wind noise at speed. That by iteslf may sell a few pairs.
I just went on a 3-day, 1000-mile ride with the guys last weekend, and I'm about to give the iPod another try on the bike, at least for the longer highway stints between twisty bits. I'll probably just use some cheap earbuds, though, for reasons they mention - getting the helmet on & off with anything that isn't completely inside my ears (like foam earplugs) is a potentially expensive PITA.