I posted a list of the equipment that I took with me to South America, here.
This time, I'm going to South East Asia, starting in The Philippines. Here's what I'm taking to South East Asia. I tried to go take even less this time. And I think I actually did that:
Clothes
2 pairs board shorts, 2 t-shirts, 1 rash guard, 1 rain jacket, 1 pair socks, 1 pair sneakers, 1 pair flip flops, 1 light hoodie, 1 travel towel. I left for the airport wearing the flip flops, a pair of board shorts, a t-shirt and the hoodie. So, I didn't really pack a lot beyond what I actually wore.
Actually, my original plan was to pack nothing other than what I was actually wearing: board shorts, a t-shirt and the flip flops. But, then it just seemed a little silly to not bring at least what I did end up packing.

Toiletries
1 shower scrub mitt
1 baggie: toothbrush, toothpaste, floss, lip balm, comb, tweezers and clippers
1 baggie: condoms, Pepto Bismol tabs, two travel soaps, aspirin, antihistamine, anti-malarial pills.
first aid kit: bandages, wipes, safety pins.
1 baggie: Q-tips.
1 baggie: Neosporin, bug cream, sun cream, crazy glue, silicon grease (for lubing the seal of the underwater camera housing), bottle of tea tree (I'm still not exactly sure why other people buy this stuff; but after trying different things, I think it cured some mild crotch chafing once), peroxide.
1 roll toilet paper.
Aside from the toilet paper and dental hygiene stuff, everything else is totally dispensable. But I figured I had the other stuff and it made sense to bring it all.

Gadgets Stuff
Going more or less clockwise from the top left, we have:
Underwater Housing for Cannon S100, $222, amazon.com.
Suunto D4 scuba dive computer, $685, amazon.com.
iphone 4.
Pen with duct tape wrapped around it (need duct tape), extra pen, notebook.
SE Asia on a Shoestring Book of Doom (aka Lonely Planet), passport (48-pages), tons of bank cards, credit cards and relevant ID cards (scuba, kiteboarding, driving), money in a binder clip.
Macboook Air (still lovin' it), 256GB solid state drive, $1,500, amazon.com.
Power cord, ear phones, outlet adapter (not a converter, meaning it fits plugs, but doesn't alter the voltate), battery charger thingee for my camera battery.
Western Digital My Passport portable 500GB hard drive for Mac, $90, amazon.com.
Cords (for iphone, camera, hard drive).
SanDisk Cruzer 16GB USB thumb drive, $13.50, amazon.com. (I paid $13.50 for it, a month later, it only costs $7.43; that's technology for you.)
Cannon PowerShot S100, 12 megapixel camera, $404, amazon.com. (A month later, it's already down to $380.)
Transcend 16GB SDHC memory card (inside camera), $15, amazon.com.
LifeProof underwater iPhone case, $65, amazon.com. (I paid $80 for it more or less as an impulse at the AT&T store.)



Storage Stuff
Deuter Futura 32 backpack--32 liters / 26” x 13” x 9”, $135, backcountry.com.
Black Diamond Magnum orange daypack--18 liters.
Assorted plastic bags, Ziplocks and aLOKSAKs. aLOKSAKS are like super-deluxe Ziplocks. They're expensive. I'm not sure they're really worth the money, but they do come in a convenient variety of sizes.
Small (but not dinky) padlock.
Hair elastics (which are good at managing cords; you can see a couple in use in the gadgets photo).
2 carabiners (mostly to signal my imagined bad-assnness).

Here's a picture of everything together (minus the hoodie, which I hadn't decided to bring, yet, and the iphone water-proof case, which I hadn't impulsively bought, yet):

Not Pictured
Cell phone contract lock-in. I'm still locked into my AT&T cell-phone contract. So, I'd be spending a minimum of about $60 a month to not use the phone (and have been doing so for the past year). This time, I'm paying a little extra to have a limited data plan on the road. It's $25 for 50MB of data a month (i.e., internet and email).
Final Thoughts
Obviously, I'm making a point of packing light. But even so, last time I left home with my 32 liter backpack, I had it filled to the gills, which was almost silly. The benefit of the 32 liter bag is that it qualifies as carry-on luggage. I've probably taken about a twenty flights with my 32 liter pack, and never once have been given trouble at a check-in counter. But, either way, I think it's important to pack space. If you pack everything super tight, it's a royal pain to manage your crap. This time, I tried to make sure I'd have some space. That's be my recommendation to anybody: deliberately pack space into your pack. If will-power fails you, you could trick yourself by packing an empty box into your backpack, and then throwing out that box when you get to the airport (and away from anything that you could decide to put into your pack).
That said, the underwater camera housing takes up an insane amount of room. I hope it's worthwhile.