I use my PDA everyday. Usually epocrates gets used once day, I have an RSI calculator, references for labs, tracking of employee data, my schedule. I have the calculator silk button go to an RPN calculator.
For note taking, get a PPK (palm portable keyboard) it allows you to have a full size keyboard that folds up to the size of the palm. I have been able to avoid purchasing a laptop by using one. For your word processing, get blue nomads wordsmith, a program that interfaces with word. For databases, get handebase.
Of course, there are many games on my palm, but I never play them in meetings or classes.
When I start grad school next Fall, I plan to use my PDA to track my anesthesia cases.
Good luck, and enjoy your computing.
I tried to be PC, but I only have a palm pilot.