Maybe this example from Stanford University Hospital backs up the case that trolley based solutions are the only way to go for mobile computing in a ward environment.
According to Robert Scoble :
They have these portable data systems, all hooked in via wifi, all
running Windows XP. They call them “cows.” Each one has a unique name.
A nurse uses them to track patient data. Doctors can dial into the
“cow” from his/her desk.
The post and pictures are here.
Update : Bill Crounse of the Microsoft Health Blog gives some more background, as well as fresh (microsoft based) variations on the theme.