I can't stand PDF as a reading format. Mostly I read electronic texts on my Palm, and the PalmOS Adobe reader is a slow, clunky memory hog and ugly to boot. If I'm going to have a downloadable copy of a text, I'd prefer it in Mobipocket (.prc) or Palm Reader (.pdb) format, if I can't have it in .rtf format so I can convert it to my favorite Palm reading program myself.