Ithildin asked about printing options earlier (page 1). An inexpensive way I've found to print poster sized items like Jack Tanner's stuff is to take it to a university copy center. Since they're not usually a for-profit operation, and supported by the larger infrastructure of the uni, their prices are much more manageable.

I want to add to Jack: Your work is gorgeous - and to read that you started with it in December is amazing and inspiring. I'm gobsmacked.