Hey Sapporo, I've bounced around various "places" in Iraq with my N800 and no problems. Some things I will suggest for that environment:

1) Keep that sucker in a ziplock bag when you're not using it (keeps most of the dust out)

2) Put a screen protector on it

3) If military, keep it in your hooch and don't take it outside the wire. It's a distraction you don't need. If not military, then do whatever.

4) Don't put it in your battle-rattle (read: LBV/body armor). It will only get crushed. After seeing an iPod die this way, I don't keep any electronics in my gear.

It's great for reading books and watching videos on long flights though. Right now I'm running through several seasons of "Top Gear".