I've been slowly adapting my Raleigh to my own tastes and utility for urban commuting. My route is not long (3.5 mi each way), and the typical hazards I deal with are pretty crappy roads (including a little bit of cobblestones), weather, and your typical road debris. For work, I have to carry a laptop to and from the office. When I've ridden a motorcycle to the office before getting frustrated with traffic along the same route, I had no qualms about throwing the computer into saddle bags draped over the passenger seat. But on a bicycle, I'm a bit apprehensive about getting panniers as I'm worried about the shocks. I don't want to slow down or take it easy and my relatively short distance allows me to have fun and my back and shoulders aren't bothered by my messenger bag. Still, if there was a reliable way to keep the computer fixed to the bike and safe from shocks and moisture, I'd prefer it. Any words of advice or experiences?