The 2009 H3T's bed is 5 feet long. You'll get a good feel for its scale in a few other gallery shots -- they show motorcycles loaded into the bed. HUMMER will initially offer 75 accessories for the H3T, like a bike chock to secure bikes or motorcycles. Bed-mounted storage boxes and a bed extender, are available, but the bed-rail system is standard.
Aftermarket companies are licensed to make 50+ more H3T accessories, including hard tonneaus, a winch, and accessories that work with the truck's bed rail system.