The less useless junk you bring with you, the less you have to carry. Especially if you are going to stay at places that are, shall we say, less than secure. My short, not very sweet story of traveling woe is that, I went to the Caribbean to visit a friend and his wife. I met him in Puerto Rico, and we traveled on from there to sint maarten, and then to saba. whilst on sint maarten, we were drugged and robbed, and the only thing I had left was my Backpack, whatever was in my pockets, and my digital camera. I lost a 20Gb iPod, 12" PowerBook, various cords and whatnot, clothes, and a nice bag. Granted, had I not felt the need to be able to offload my pictures to something else, I would not have taken the laptop
the moral of my story is: 1) be careful where you have a beer in a foreign country, and 2) don't sleep in your rental car. My friend lost a laptop, 60Gb iPod, camcorder, two digital cameras, and a bunch of other crap at the same time. Travel light, it's less to get stolen, and less to carry with you. =D