So we have all read that Snow Leopard's iCal has at least three ways to view/edit an event's details. We have 10.5's bubble style, iCal's Advanced » Open Events in Separate Windows preference, and the Edit » Show Inspector menu item.
Here's a twist, if you are in the bubble window mode, you can click and drag the window. Once you move it a short distance away, it becomes a separate window. You can do this to multiple events, to compare details of two or more events.
[robg adds: In 10.5, you could drag the bubble window and it would detach, but it wouldn't convert into a normal window, and you could still only have one such window open at a time.]

