I have seen a briefing on a similar automated loadsheet system that my company was looking at. Probably most systems are the same but the one that I saw resulted in the crew member inputting the various load information. Obviously the Captain can't 'sign' an e-loadsheet so the crew member is given a User ID and a Password and this is used to verify who accepted the loadsheet! A copy is then e-mailed from the PDA/Laptop to Ops where it is stored and archived in accordance with the regulations.
A good system!