I'm looking for a PDA that will sync with an Exchange account in mail.app. I need it to sync my Exchange mail and my Exchange calendar. Since mail.app doesn't really do exchange calendars, i could live with it synching mail only, and synching calendar with iCal. Can someone recommend a good one? I'm looking for one that is slim. I already carry a money clip, a cell phone, keys, and a pack of gum. Adding one more thing to my front pocket is going to look ridiculous. Ideally if I could replace my current cell phone with a phone that is also a PDA, that would be great. I have Cingular, if anyone knows of a pda phone they have that works with Macs. Trying to find that info on their site is a pain.