Yes, if you have access to either the attic or crawlspace right above/beneath the room, it is relatively easy to completely hide the wires in-wall. See these booklets for what you can do.

If in-wall wiring is not feasible, I would go with the Cordmate II on-wall raceways, available at your local Home Depot. As an example, the photo below is our living room with the on-wall wiring via the Cordmate II to a pair of the QS8 surrounds.

[image]http://us.f1.yahoofs.com/users/910e16c/bc/My+Documents/__hr_BackWall.jpg?BCfuQ4.AZl_Vpp_q[/image]