So, you want to travel the world, eh?

Here is a thorough, but not exhaustive list of resources to help plan a trip, especially those I found useful:

Viva la travel!

Traveler Forums: (Start here!)
Lonely Planet Thorntree
Boots-n-all Forums

Normal Airline Tickets:
Kayak (simply the best, expanding)
Opodo (good for intl)

Air Consolidators:
Best Travel Store (very good for one-way)
Airlineconsolidator.com

Around-the-World Tickets, Air Programs
AirTreks (US Origination)
Quantas (Australia)
Free Frequent Flier Miles (for the thrifty)
Flyer Talk (Forum for Air Travelers)

Hospitality Networks:
www.couchsurfing.com
www.hospitalityclub.org

General knowledge bases:
Round the World FAQ
PoorButHappy.com (Colombia, India, expanding)
www.hobotraveler.com (10 years full-time travel)
www.gridskipper.com (urban chic hints, global reach)
Hasbrouck.org (good general advice, wrote a recent book)

US Embassies/Passport Info:
Worldwide List
Losing a Passport Abroad
Passport Application

Visa Information:
US State Dept Visa List (country-by-country for US Citizens)

Travel Insurance:
World Nomads (Aussie, very good, easy online renewals)

Inspiring:
Globalwalk.org (5 years walking across the world for breast cancer)
Gonebikeabout.com (two Swiss friends who biked for 26 months in mid-career)
Pushonnorth.org (my friend Tim: Tierra del Fuego to Alaska for Drs. without borders)
Edsgonesouth.com (for the motorcycle-minded)
Acercandoelmundo.com (spanish) (10 year plan to circle the world)

Where to Go:
UNESCO (world heritage sites)

Camera Advice & Info:
DP Review (you need go no further)

Tech:
the-gadgeteer.com (among many)
Kropla.com (electric compatibility)

Packing Lists:
One Bag (exhaustive, see gray menu bar)

Reverse Engineering: (see how travelers did it, budgeted, etc)
Thirteen Months (leave it to graphic designers..)
Life Nomadic (cocky SOBs, but with careful thought about their gear)

Diseases etc:
World Health Org's Typical Baddies
For "what's wrong with me", use wikipedia.org
Travelsafely.com (hepatitus A/B)

Banking:
Emigrant Direct (high-ish $$-yield savings acct)
Everbank (online banking)
finance.yahoo.com (exchange rates)
xe.com (exchange rates)