I co-own a small two person booking agency. We both use Apple laptops. We use Address Book and iCal on a daily basis. With Address book and iCal, we share contacts and calender events. Currently, we are just emailing each other new entries into either. We also sync address book and iCal to our Palm Treo 650's. What we would like to do, if it is possible, is set up another Mac as a file server, where we could store contracts on, etc, and set up that machine as a master iCal and Address book server, then simply use that address book and iCal as the main one where we can access that to view all contacts. Now I know how to subscribe to an iCal and address book. What we can't do with that situation is add any contacts in that situation without accessing the host computer. Does anyone out there know how to do that? Is there software out there that will accomplish that instead? We are a small business and don't have the funds for a xserve or expensive programs such as File Maker Pro (although we will probably do that at a later date). Can we do this? Please feel free to write me at email@example.com with suggestions.