There was a thread announcing a new online store: geekgames.net. Not sure if the owner deleted the thread (feeling like a shill) or the admins did (advertising/rules violation), but I have no affiliation with the site so I think I can mention it. It exists. Thought it was worth mentioning.
I think that's the one I did check out yesterday as it mentioned it had flat rate shipping... but I think it was flat rate per game not order... and even when ordering just one game at a couple I looked at it was about the same price as ordering from boardsandbits.com with their per order flat rate shipping, especially on RGG titles which b&b usually has marked 38% off msrp. If you are ordering more than one game however b&b easily beats them.
Don't know if he or she does but if they have a pick up option for folks within driving range of them then it would likely be worth it.