Many Tiger users have been disappointed not to find a Dashboard widget that displays upcoming iCal Events. I've just released version 2.0.2 of my iCal Events widget, which does just that.
iCal Events displays upcoming events from multiple calendars in a simple, beautiful widget for Dashboard. You can see up to two weeks of upcoming events in the same widget.
[robg adds: iCalEvents was one of the first third-party widgets I found, and I find it incredibly useful (especially when combined with today's hint on using Dashbaord at-a-glance). Since it's free, I felt it worth a mention here. If you know of others that do similar, please feel free to post them in the comments.]
Mac OS X Hints
http://hints.macworld.com/article.php?story=20050524184750211