Here comes something I have been wanting for a long time: an easy way to sync my Outlook Calendar with Google Calendar so that I can share my schedule with my wife. Oh, and co-counsel, I suppose.
Since I am always changing from one program to another, it also makes it easier to track my calendar through other applications like Thunderbird, Evolution, Rainlender, etc. Now if only all those programs played nice with iCalendar .ics files. (They all import and/or read them; only some will write to them properly.)