On the topic of sharing and printing data models. I am fortunate in that I work for an agency that also does GIS (mapping) work. We have big plotters that can print/plot large poster sized sheets of paper. I can make some very nice data models without having to tape together tiny pieces of paper.

Of course, some data models are bigger than even poster sized paper. But putting 2 or 4 of those pieces of paper together is no big deal. And it is wonderful decoration for my walls.