Destinations:

Lonely Planet--my absolute favorite destination info site

CIA World Factbook--just how many miles of paved runways are there in Tuvalu?

City.net--loads of info on thousands of world cities

National Geographic Online--the old faithful of travelers and would-be travelers--now online

Escape Magazine--adventure travel

Fodor's Travel Guide--a very good travel guide. Though not as budget conscious as some of us, it offers a wealth of useful info for all travelers.