Google Calendar has become hugely popular and pretty soon you are going to start seeing buttons (like the one to the right) popping up all over the Web. These buttons allow a user to add an event to their calendar with one simple click. The downside to these buttons is that they are kind of a pain to create manually, but now there is a solution for that. The Google Calendar Button Generator allows you to input the date and specifics for the event and then have it generate the code for you.
Google Calendar has been released to the public for less than three weeks and already there are tools popping up left and right. It is exciting to see how extensible this calendar is and how many people are taking advantage of the large feature set.