About the hub, a guy I know via an other Forum (non-cycling) related, his brother is really into bikes and rebuilding them. He had fab'd up one for his own use and I asked for one too. No, he's not looking to make them in bulk, he has a day job...
About gears vs fixed, I'll put the bike back for my serious races. Otherwise, what a hoot to ride and I'd rather ride and smile more than not!