Extremely rugged laptops take a lot of abuse in stride, but tend do cost over $5000. I wonder if a hardy, ruggedised netbook would sell well to people who need some computing on the go in adverse conditions, but nothing too demanding. It would end up costing about the same as a regular laptop, but would take much more of a beating.
Mokalus of Borg
PS - The down side would be that you can't do much with it.
PPS - And people might not expect to pay even that much for such low power.