Hey Paul, welcome to the forums! Enjoy your stay... Do you happen to have any of those 3t stems in threaded and silver? Also I think that if you get some frames built they should be pretty no-frills, ie. lower range butted steel tubes tigged together. if you wanted to make it more fancy you could try some shaped tubes; you don't really see shaped steel tubes on track bikes these days. The geometry would be up to you and your customers though I guess. Just don't use those butt ugly sheet metal track ends!

I have also been thinking over the velodrome in toronto idea for a little while. Rents in downtown are crazy, but theres plenty of places within the GTA accessible by bike or transit that could be rented for not too bad a price (think scarborough). There is also the Waterfront Revitalization Program happening over the next 50 or so years, so eventually all the derelict east donlands and other brownfields will be redeveloped. Now would be the time to get in on that land before it starts rising much more in value; At the moment the city (or province, or feds, as the parcels of land there are pretty much divided up between the 3 levels or government and private ownership) might still be pretty receptive to give some subsidies and land grants to such a noble cause. Its really just a whole mess of logistics and red tape, and I have no idea about the complexities of building and maintaining a track as well as keeping the whole operation in the black...