I thumbed thru the 3rd edition of Robot Builder's Bonanza today and so when I got home I dragged out my copy of the 2nd edition & did a quick comparison of the table of contents online. It seemed that most of the material was the same but perhaps rearranged a little bit. I didn't delve in detail into any of the EE related stuff that Predko supposedly was involved in rehashing. I welcome comments from anyone who has read in more detail both the 2nd and 3rd editions.
I also want to state that I received the 2nd edition in 2000 as a gift. Everytime I look at this book, it grows in value to me. 6 years ago - and even recently - I might not have realized how important and perfectly targetted some parts of the book are. The more I learn - especially from this newsgroup - and even more so by tinkering (snap crackle sizzle and ouch! ), the more valuable the contents of the 2nd edition becomes to me! Since I decided to finally build a bot totally from scratch I find myself reading in depth what I once glossed over.
Add me to the many fans saying "Thanks Gordon!"