My new job requires heavy use of a PDA for organization and scheduling. I have an old Palm Vx that does the trick, but I hate carrying more than I need - my BatBelt is bad enough as it is. A single integrated device would be great. I'm thinking one of the new generation combination PDAs / mobile phones such as Blackberry or one of the WinCE machines would be a big help. Getting the wireless email feature would be nice, and if it can handle MP3s, all the better. Any tech freaks here that have or use one of these devices that can comment on the relative pros and cons of the various devices?