Well looks like the tool that I had the idea for and Adam (from Nobody Likes Onions) developed made it to the front page of Digg. It is up to over 700 diggs right now.
It creates a button for your website / blog / MySpace / etc where anyone can click on and your event is automatically added to their Google Calendar.
Google supplied the docs on how to create the button, just strange they didn’t design the tool themselves.
Check out Google Cal Button.