Hi Bert, Kathy and Bryan, keep up the good work!
I found the PDF version of the SCJP book really useful for reading a couple of chapters without carrying the whole book around.
I don't mind how big the PDF for a chapter is. 10-15MB per chapter? No problem. I prefer tech books with lots of pictures. I tend to fall alseep if the word-to-picture ratio is too high!
I've just opened up the 4MB PDF of JSP 2.0 spec, So I've got no problem with a big PDF for each chapter of study guides.
Cheers,
Rex.