Question
wouldn't that increase your position since most guestbooks are crawled?
Answer
I've had people do that to my books, and I just delete them. I'm not an advertising board.
Answer
Doesn't it have to be an actual link, not just your url as a signature to count toward page rank?
Answer
newschick you could be right, if its not linked i don't think the spider will follow it.
Answer
I believe Google has started ignoring them and links from links.htm pages.