Exchange Server at Home?

My spouse and myself would like to share the calenders we keep on our phones, our work computers, and home computers. Any ideas?

I sync my contacts, emails, and calendar from my home computer and she does the same on a different computer. When I do this at work everything goes on the exchange server and it works out well; anyone can see the public parts of my calendar through outlook. We where thinking we can duplicate that at home somehow.

At first I was thinking about finding a place like godaddy.com and seeing if they could host it for me, but I didn't see them offering anything like that. At least nothing as simple as activesync.

Check out Google Calendar. Lots of options (including Remember the Milk)
http://en.wikipedia.org/wiki/Google_Calendar
http://www.google.com/intl/en/google.../overview.html
http://www.rememberthemilk.com/services/googlecalendar/