Love Google Calendar!
I always use the quick add feature of Google Calendar to add events, that way I can type in things like "Call with Jack Tuesday morning at 9" and an event is added. Today I figured I'd paste this directly from an email: Blake has a meeting in Houston on Tuesday. We need to change the staff meeting to Wednesday. I was thinking 10:00 if that works for you. It seemed like a long shot, but it worked! It made an event on Wednesday at 10 am, I was surprised and then realized that in the future these sorts of things will be parsed from your email automatically and you'll simply accept them into your calendar. I like!