>1) Use wireless ethernet cards. ($$)
>I am unsure of the distances and speeds they operate at.

they're doctors, they can afford it :).


>3) Use a cellular modem with PC anywhere or citrix server ($$$)
>
Sounds like a nightmare to me. For users and for you.


>2) Make a synchronization routine. The doctors carry a copy of the database with them then manually schronize it when they arrive in the unit or at an live ethernet port.

The above is pretty close to what offline views are designed for. I have never implemented one, so I can't give you any pointers, except to give 'em a look.