That sounds perfectly acceptable to me. It seems most conferences end up with an inaccurate printed book, sadly. The laser-printer "just printed this morning" sheets are usually what I look for personally. Either that or an online copy (PDF or google calendar type thing).

The only problem might be if sponsors pay to be in the book, and I can't recall if the Penguicon booklet has sponsors in it or not. Which may actually speak to its usefulness, if I can't remember what the booklet looks like...

-Shawn