Traveler's Aid
Peter Greenberg, aka The Travel Detective, is a great source of info for the harried traveler. I love his translations of travel industry speak--"secluded hideaway" means impossible to find or "carefree natives" equals terrible service. His newest offering The Complete Travel Detective Bible is loaded with tips on everything from where and how to get the best prices to details like which cruise lines have the highest illness records or where is the best place to swim with dolphins.
Another source--an extremely helpful list of 25 travel sites compiled by Travel and Leisure covers air and hotel pricing, currency conversion, restaurant menus and even reviews 12,000 public bathrooms in 120 countries.