Anyone know the cost of White Industries Eno Crank? The green one? I didn't see a price on their site.

around $180. speedgoat has (or at least had) them.

Cool-looking crank, lame proprietary chainring.

a friend of mine who actually posts here from time to time (calling scott!!) has, or perhaps had, a set. he got them on the "i work at a bike shop" discount tip.

truth.

Got them on my fixed mountain bike. I would not recomend them for a fixed rig since the chainring easily develops play if the lockring isn't tightened frequently.

Are they done up like a 1pc crankset with the inner cone tightened against the chainwheel?

Yeah, The chainwhell fits on the crank arm with a splined interface and then a lockring tightens against the chainwheel holding it onto the crank arm splines. I think the cranks would work really well for Single Speed but not for fixed riding - the back pressure from riding fixed helps to gradually loosen the lockring and let play develope between the cranks and chainwheel.