If you contact a printers regarding a low quantity black only run then you will likely get one response....will you go digital?. Printers who specialize in this kind of work buy modern digital machinery specifically for that task. The offset book your looking for will likely be printed on a large offset press that does not usually pump out black only work, usually will be full colour work. Usually they will shy away from black only work because there is better money to be made, OR to make it worth their while, they will hit you with a price that covers the machine time, as if it was a full colour book they where printing. The cost of the paper between a 150 run and a 500 run book is negligible.
Its turned into quite a complicated can of worms, Markus a while back in this thread suggested a revised lulu edition (maybe better stock etc, not sure how far you can go with lulu?), that would certainly make the job a lot easier for folk, no money wories, no delivery hassles, less errors etc etc. As Brian pointed out though, seemed id forgot this book idea was based on top quality printing, just cant help thinking there needs to be a compromise somewhere along the lines.
I think with enough searching you will find an offset printers that handles individual shipping, hopefully at a reasonable rate, but in my experience, they usually see that as another money maker.
I do hope the offset idea comes to light, some offset printers struggle to compete in the modern age of digital