I just launched the TripReportDatabase. As the name implies, it's a site devoted to user-contributed trip reports. Registered users can post reports of their flights, hotel/lodging stays, and airport lounge visits. These reports are then linked to the site's very large database of over 5000 airports/virtually every airline/etc thus making it easy for other users to filter through the morass and find the reports of greatest interest.

Definitely take a look. The site is very young (2 days old) but with time I hope it becomes a valuable resource for the travel community.