Originally Posted by snowpilot
I'm wondering the same thing. My wife and i are both on the road all the time and i want to be able to make a change to my calendar which would change her calendar on the otherside of the world.
Any hosted BES/Exchange should do this for you. If you're not familiar with Outlook in an Exchange environment then you probably haven't used this feature within Outlook but here's what you need to do: create a meeting request, add your wife to the attendees, enter the details, and then send out the request. It will place an entry in your calendar and when your wife accepts the request it will also place it on her calendar. She can also suggest a different date/time. Further, if you reschedule the meeting you can send out an update once you make the changes that will adjust her calendar appropriately.
My partner (SO, not business partner) do this all the time and it's an incredibly useful function of Exchange. It would be nice if it's cheaper, but we're both very busy professionals who rely on our Blackberries and Outlook for everything.
By the way - if you accidentally choose to create an appointment instead of a meeting request, no big deal. Just add attendees to your appointment and you'll achieve the same effect as creating a meeting request. You can even do this to exisiting appointments in your calendar. These requests and changes can be made both in Outlook and on your handhelds.