The trouble with parallels and crossover is that you can't get a palm working with them, so George might work, I know it does with cross over but pocket George won't. Trouble with web based solutions is that when you go out with your smartphone and want to update whilst on the road you are dependant on having a celular network. Unless one of these cloud companies releases an app for the smart phones that will store info when it's off line the cloud based solutions just won't work.
Simon.