Anyone have any suggestions on a fashionable sling-type bag for a 15" PB? InCase has the SlingPack but the darn thing looks kind of frumpy. http://www.goincase.com/DetailLaptopPackSling.php I'm looking for something a little more trendier--kind of like the sling bags Jansport has but for a laptop. And I'm not talking about messenger bags either. Ideas anyone?