If the laptop bag-making industry has any unsung hero of design, it would be BBP Bags, which years ago released Hamptons -- a MacBook carrying case with an ingeniously designed strap system that combined the best features of a messenger bag, backpack, and laptop sleeve into one product. We loved Hamptons enough to keep using it for three years, stopping only when the 11.6" MacBook Air proved way too small for its laptop compartment. So it's a mixed…