I recently started playing with google calendar in more detail, and found that it does some pretty cool things. The option to send you an SMS reminder for appointments is very cool. The way it allows you to add "quick events" by parsing a string something like "Movies on 17 Feb at 9pm" is also quite cool. The coolest one though has to be this:
I was seriously excited about this one. Unfortunately it doesn't seem to work for me. In fact my SMS reminders don't come from the number in the article. And sending a message to either short SMS code doesn't do anything. bleh!