When updating my calendars after upgrading iCal, I discovered that you can roll your scrollwheel forward or backward to the information you want. For example, when entereing a date, just roll your wheel to move ahead! Or to change the importance of a To Do, roll again. Even the new Time Zone field works! WOW talk about saving time...
Mac OS X Hints
http://hints.macworld.com/article.php?story=20031009061940821