Camera Armor has a sensible idea--form-fitting silicone rubber skins to protect your high-end camera gear against shocks, muck and water. You can buy these for cheapo iPods, so why not your $3,000 SLR?
Camera Armor got its start with the most mainstream SLRs from Canon and Nikon. It's extended its product line since the last time I checked in, with products to encase the Sony Alpha A100 SLR and a much broader array of Canon and Nikon models. Prices range from $50 to $80.