Official information:
From travel warnings to where and how to apply for a passport ....

US State Department – Bureau of Consular Affairs

Airplane Security: Prohibited Items

FAA: Passenger Information

Home page
Security Checkpoint Wait Times

Health and disease concerns?

CDC for Travelers’ Health

Before you go ..

The World Factbook

Tips for Older Americans   (for young people as well)

"Back Door" Travel Tips (Rick Steves)

Time around the world

Greenwich Mean Time

CNN World Time (need to download Macromedia Shockwave, has local time and time conversion)

World Time Zone (has local time for various countries)

Time And Date (the Meeting Planner - has multiple cities display)

Worldtime.com

Weather around the world

CNN.com weather

National weather Service

Weather.com (request local forecasts)

USA Today Weather

Celsius  to Fahrenheit, or kilometer to mile conversion

Digital Dutch Unit Converter

Legacy Systems Converter

Currency conversion

Yahoo Currency Converter

Oanda Currency Converter

Maps, Maps and Maps!

Altavista Maps (domestic only but has driving directions)

Yahoo Maps (domestic only but has driving directions)
MapQuest (domestic only but has driving directions)

National Geographic Maps (by region and country)

University of Texas Map Library (has some city and airport maps)

BabelFish
FreeTranslation.com

Other major travel sites