Hey Dan, wasn't suggesting a full PDF version of the book. Obviously I wasn't clear enough :(.
It would be nice if a PDF version of only the changes made to each release was available. That is, you don't rewrite the workbook every time (well I hope not)...only change the relevant parts for the newest release of the software. So in effect, for those of us that had purchased the workbooks, we would only get a select number of PDF pages that show the updated practices with the software. We could than print those out and insert it between the correct pages in the actual book.
Cheers.