Using Marketpress in bricks&mortar shops?

Has anyone tried using Marketpress to unite a bricks&mortar shop and its online shop?

I’m setting up a trial where the real shop is a kind of showroom for the online shop, but which may sell the products in person too. The items will be mostly limited-edition, so joined-up stock-control is important.

Any thoughts? I don’t want them to be going in and editing the product itself, but perhaps having an easy-buy function that doesn’t require them to go through the payment process.