Where is the best shopping in downtown Boston?

Where's the best shopping in downtown Boston? We're going to the Boston area for Thanksgiving to visit some relatives who are, themselves, relatively new to the area.

[drschilling]

It all depends, of course, on what you're shopping for. I am partial to the following areas for shopping: in an around Harvard, MIT. The Waterfront & Wharves, the North End, Beacon Hill, and of course Back Bay where you'll find the premier shopping area in Boston: Newbury Street.

Let me know what you're looking for and I'll try to point you to more specific venues/stores.