couldn't agree more - especially with the analysis of those who think everything is brilliant :)
I was at a "Web 2.0 talk" this week and the speaker talked about TripAdvisor as one of the must have sites in this new era of the internet where network effects really take hold. What's surprised me is how many travel companies are doing very cool web 2.0 type stuff under the radar. The paper from Reactive is well worth a look to see what I mean
http://blogs.reactive.com/2007/01/web-20-for-travel-and-tourism.html