I think the brick 'n' mortar store will sell you the memory module, but I don't know that they'll install it for you. I hadn't heard they were doing any BTO stuff in the store. I'd still be surprised if it was cheaper to buy the memory from Apple (especially if you don't do BTO). Have you checked OWC's prices?
The more I do with Aperture the more I want (no
need!) more screen real estate than my MacBook provides. The add'l HP of a real graphics chip would make things nice, too.
