BTW: Anyone who wants to be amazed should read
UpSpin's How-to post on PDF conversion and then look at the screen shots.
I had the chance to look at his conversion of a physics textbook chapter on both the eReaders I own and was obliterated by the flexiblity and readability of that file. If all PDFs looked like that, then I'd recommened that everyone who wants to read PDFs should buy an eReader.
(Sadly, most PDFs prove awkward and idiosyncratic.)