Panasonic (Matshita) UJ-845
Notebooks are not usually big on upgrade potential. The parts are difficult to obtain, are generally more expensive, and people are nervous about opening up an expensive piece of equipment.
One of the few upgrades paths is the optical drive. Typically a notebook will have a CD burner, possibly with DVD reading capabilities. The latest notebooks will undoubtedly contain a DVD burner, but the great majority will be lacking this feature. Enter the Panasonic UJ-845!