Those specs are minimal. For example, it doesn't mention internal memory capacity, the processor and speed, the fact it has one USB port, etc. So, it probably has the Wacom digitizer since all indications to date suggest it's a miniaturized version of the existing eDGe and uses the same firmware and applications (which require a Wacom digitizer).

The optical finger mouse is a square patch that tracks your finger movement over it, much like a track pad on a laptop, or the way an optical desktop mouse senses movement over a desktop. I find the trackball thingy on the current eDGe too sensitive and hope the optical replacement is more steady.