I tend to pack a massive load of zip-loc bags. Somehow, I always seem to travel during the rainy season wherever I go (Chiapas, Honduras, Tibet, Tanzania, etc.), and I often find myself soaked (see places above). Megan and I spent a lot of our days in Tanzania rushing to stuff documents in plastic bags while deciding who got to use our one large waterproof pack cover. I tend to travel without electronics for the same reason. At the same time, an MP3 player can offer desperate relief from a world of strange noises, offer a short break from the culture shock, or provide a Zach Braff-esque soundtrack for the world around you.
Anyway, iPod is apparently creating a waterproof Shuffle with 2 gigabytes of memory (link to a great blog written by a tech-savvy 12-year-old). This will be an amazing breakthrough for travel purposes. That's one key item that won't face ruin when I end up in my next rainy season (maybe India during monsoon?).