I was able to speed up the printing of .PDF files on my Canon BJC-610 by
changing the printer resolution from 360dpi to 180dpi. This produced
adequate resolution and increased the speed by more than the expected
4X, possibly because of reduced print buffering.
I couldn't live without .PDF either -- it's great being able to get data
sheets online. I recently even printed out a 101 page Silicon Systems
modem design manual, obtained from their web site.

Maris