Update (8/7 3:15pm): Amazon has the Wenger Backpack by SwissGear with Padded Sleeve for Laptops: $42.99 shipped (orig. $140), within $5 of its best price ever.
Newegg offers the Case Logic Anthracite Berkley 14-inch laptop and tablet backpack (model BPCA-114) for $21.99 with free shipping when you enter coupon code EMCPBPC93 at checkout. That’s 63% off list and the best price we have ever seen.
It features a large compartment that can accommodate up to a 14-inch laptop, ample accessory storage, a hidden pocket for valuables, and a tablet sleeve. Rated 4.7 out of 5 stars from 50 Amazon reviewers.
Also available, Amazon has the Case Logic 15.6-Inch Laptop Backpack (MLBP-115BLK) for $31.39 (orig. $70) and MacMall has the Swissgear Sherpa DX 16″ Laptop Backpack (28016050) for $19.99 with free shipping on orders over $25 (orig. $70).