How do people like their tooltips?

[hailstone]

According to Wikipedia:

The tooltip is a common graphical user interface element. It is used in conjunction with a cursor, usually a mouse pointer. The user hovers the cursor over an item, without clicking it, and a small box appears with supplementary information regarding the item being hovered over.

How would you like the tooltips to be included? My thoughts are to use the XML files to provide the information that comes up in the boxes. What information will be shown for what things?

Will there be a time before the tooltip is shown or does it appear immediately on hover?

[daniel.santos]

I think there should be a delay before a tool tip appears if it appears as a ballon-type window.  XML sounds like a great place for such information.  There is already information that appears when you mouse over a command button however.  I think that the hotkeys should be added to that information and the hotkeys stuck in the glest.ini file as well .  Just my 2 cents.