I've ridden with computers in netbook form factor before there were netbooks (and before they were as inexpensive...for example a 10" Sony Vaio around Australia in 2001. I've used foam padding inside a large ziplock bag. On the Australia trip, the disk drive eventually went - but on similar trip across Russia with new smaller Vaio in 2007, all survived some rough roads. Since then I've also taken a real netbook through ~2000 miles in foam padding and ziplock bag without problems.