The gear

Just how does one pack for 4.5 months of travel in temperate and tropical climates? I'm going from winter in OZ, to Everest base camp, to monsoon season in Vietnam, to fire and ice in Reykjavik, Iceland. I figure I shouldn't pack too much clothing, and rely more on layering. I also shouldn't pack too many consumables that I could buy locally. I really hope I didn't forget anything major! I ended up packing the following major items (no I won't list everything):

85L backpack w/ detachable day pack (for everything to fit!)
Good leather boots (avoid sprained ankles)
Techamphibians (sandle/shoe hybrid - for jungle trekking)
Flipflops
Quick-dry long sleeve dress shirt, short sleeve dress shirt, khakis, shorts, and socks (cotton is cheap, and can buy it locally)
Rain/wind-shell
Gym/swim shorts, goggles
Sleeping t-shirt
Dry-fit shirt (for exercising/long sweaty hikes..)
Thin long-sleeve shirt (for cold nights)
Medication for malaria, altitude sickness and bacteria
Travel guides for Japan, China and South-East Asia
Language dictionaries + audio courses
GSM World-phone/PDA (HTC TyTN) + another backup phone (Szu-Bei's old Nokia)
Trucker's alarm clock (120 dB! It will wake the dead!!)
5 MP point-and-shoot camera
10 GB of micro-SD cards for phone and camera
Compass + thermometer
Duct tape
Insect repellent
First Aid Kit (sutures, bandages, pain killers, disinfectant)
Water-purification tablets
Toilet paper!!
Anti-theft high-tensile steel netting
Gifts for friends and random Canadian souvenirs for new people