The Seattle Times has an interesting article on how guidebooks aren't going to be replaced by ebooks. Here is an excerpt:
Even as more guidebook publishers, travel websites and others make travel information available online, publishers say they expect sales of guidebooks — the paper-and-ink kind — to remain strong.
"The book is such a great technology. It's lightweight, it's mobile and the battery never runs out," said Matt Goldberg, the CEO of Lonely Planet, an Australian travel guide publishing company that covers the world with more than 600 guidebooks in 17 languages.
I think all of the points in the article are true. It's been my experience that mot ereaders can't duplicate the way users search for content. But that is a software limitation. If the digital guidebook were on the iPhone or iPad, then it could actually be more useful than a paper copy. I don't like Apple, but I will say that the iPhone does have the best UI design.