i have speaker wire face plates.

http://www.cablestogo.com/product.asp?cat_id=2232&sku=37073#

these are the ones i have, you can get similar ones off of ebay for a bit less i thinkg... They say 14 gauge, but i have 12 gauge ran to them. prior to having these, i had the speaker wire though a hole, that was just the right size... Having the plates however make everything look much cleaner. I mainly did it for when the house is sold. Instead of having bare wires sticking out of the celling when we go to sell, we will have the plates.