I know there's a workaround whereby one can accomplish this, or nearly so, with the rotate/copy function; however, the implementation is somewhat inelegant, especially for new users who might not be aware of the 360/x syntax. It has been a number of years since I have used CAD, but I recall the Polar Array command being much more full-featured and am struck that AI still doesn't have a better way to do this. In point of fact, a liner array wouldn't be a bad addition, either, and would save the headache of trying to do it with patterns or aligns.