ActiveSync is a Windows (Mobile/CE/etc) PDA/Phone thing. And I can sync without a data plan on those.
Be aware some need a lot of support to get this to work. And many expected it to be easy or free. Have you used any PDAs?
I'm interested in switching from a regular cell phone to a pda/smartphone. I don't need features like browsing the web or checking email. The features I want to use are contacts, calendar, and task list - and syncing this with my computer at home, preferably with bluetooth. I was told that I must get a data plan to do this with a blackberry. Is that true? Isn't there a phone that can sync wirelessly with the computer for basic organizational functions like that (like my old Palm Pilot used to do) - without having to pay for a data plan? I have Verizon Wireless.