I have an apple iPad. I bought it because it was "freaking awesome" but also use it for work.
The citrix app lets me run many of the programs I need for my job, and the outlook exchange lets me get my email without having to lug around my full blown laptop. For 2-3 day sales trip where I am not doing heavy computing, the iPad works great.
Its also nice because I can watch netflix in the hotel room if there is nothing on the tube, as well as play a buttload of games.