Yeah, I have one where the sound broke after the volume dial broke and fell inside the case. Then there's the line that doesn't show graphics anymore.... I mean, I remember hearing the legend about the one that survived a fire and would still turn on and "ding" but wouldn't play games, so thats pretty dang tought.
The new DS Lites are pretty tough too, I dropped mine from a shirt pocket I had foolishly placed it in. Fell the distance of a small set of steps to a roadway. Only damage was some minor scratch marks which is better than I can say for my Dell laptop which fell 3 feet off a keyboard and nearly split open. CD drive hasn't been quite proper since.