I don't, and probably won't for a long time.
The problem I have with smartphones is by putting all that capability into a single device, you're asking for problems if it ever gets lost or damaged. Because then instead of just all your contact info; they now have your bank info, credit card info, personal photos and song collection, and pretty much anything they want that can be stored on a smartphone.
Plus the whole thing with the interface, I kind of can't control my servers that well from a touchscreen and really don't like any of the UIs they have.