Best way to hide speaker wire that is run along a wall...

What is the best product that I can get to hide speaker wires. I need to run speaker wires along the wall in my bedroom to my surround speakers. The room is carpted so I can probably push at least on 18 gauge wire down in the gap between the carpet and the wall, but I would think that there is some nice trim made that is designed specifically for this...also, will 18 guage be suitable for surround speakers?

I would run the wire under the carpet, between the tack strip and the wall.
There is usually enough space there for 16ga and up. After you've run the
wire, use a small hammer to press the carpet back on the tack strip.
As a final step, take a spatula (putty knife) or broad knife, and push down
any pieces of carpet that come in contact with the wall.......vardo

Your local lighting store should have some cheap, thin cable raceways...I did my 20 X 24 room for under $50...they're come in various sizes, and I just attached them on top of my baseboard trim and painted them the same color...You don't even notice them, and my new puppy hasn't eaten a wire in weeks.