new "Singlespeed" line of bags made of canvas and leather with straps and buckles. Weather resistant, not waterproof. Cool for off-bike use too. http://www.timbuk2.com/tb2/retail/catalog.htm

new "pro" bags made with lightweight sailcloth nylon designed to take lots of punishment. 3M reflective strips. http://www.timbuk2.com/tb2/retail/catalog.htm