Found this hub on the interwebs:
The rear hub is described as a "Campagnolo pista". So anyway, did Campagnolo make coaster brake hubs???
Oh, and where can I get 'em..... Anyone got one lying around they don't want???
By the way, if anyone does a search for this they may see campyonly's rumor about a Campagnolo "Pesante" gruppo (based around a coaster brake) from 2006. Note the date of the rumour (April 1st). Don't get sucked in like I did.