I came across this great little widget that interacts with Apple’s iCal, appropiately called iCal Events. Here’s a description from the developer…
“Face the day! Always know what’s next in your schedule using iCal Events. 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.
On the widget’s reverse side, you can choose which calendars to view using iCal-style colored checkboxes. You can also choose how many days of upcoming events to display in the widget.”