I doubt all walmarts will stock this, so the free shipping will depend on if you can find a walmart with this.
I really don't see how linux OS pc would be mainstream enough to sell at walmart?
I do like the idea of the low low power and 6 USB's.
now 4 are on the motherboard itself I assume and 2 on the case?
I bring this up because My only beef with the intel mini ITx is that it only has 2 USB's directly on the board, (but you can plug in two more sets of two)