Timbuk2 Designs will unveil several new computer briefcases this week. They include: the Commute Bag, a messenger-style briefcase that now comes in a XL size that’s two inches wider to fit 15-inch and 17-inch laptops; the Detour, a minimalist case that offers three different carrying options; the Laptop Tote Computer, which sports a padded center and exterior zip pockets; the Laptop Zip Sleeve, which provides 360 degrees of padded protection; and the Accessory Case that attaches to any shoulder strap or belt to keep your personal accessories easily available.