I got my N800 in a warranty repair/replacement after sending in my 770 that had stopped reading MMC cards.

During the time that I've had it (not sure exactly how long it's been) the following has happened:
1. Knocked off treadmill shelf at gym, landed on the treads, got rocketed off of the back onto a concrete floor. Not a scratch, was still on and playing music. I, however, nearly smashed my face against the hand rails freaking out trying to catch it.
2. Launched off of my lovesac (it's a chair...pervs) about three feet into the air and onto the floor.
3. I jumped on it. Yep. Set it down on the lovesac, went to go check on something in the kitchen, came back, and jumped on it. The flipstand broke (this is actually quite obnoxious, but my own damn fault)
4. Left in the end pouch of my duffel bag and thrown underneath a bus for a 5 hour trip back from Minnesota.
5. I'm pretty sure I stepped on it once while it was in my backpack...

The only other device I have that is still going after this much abuse is the iPod Photo I bought used off of ebay two years ago, but it's certainly not what I would call "perfectly fine"...that thing has been dropped, kicked, slammed (usually intentionally after it locks up) and it's been exposed to its share of liquid during swim meets.