Hey, great little tip!
we recently put in a surround sound system into our living room (we're a little behind the times!) and we had the problem of tonnes of cables going here there and everywhere.
we have mahogany base-board and couldnt find anything that didnt look even more out of place than the cables!
someone suggested we use something called d-line trunking to tidy them away as they do wooden fibre ones that you can varnish.
I was very impressed with it and thought i'd share a great tip! i found them here: Google "d-line-it.co.uk"
hope this helps