Speakers need power... power comes from a wall source. So either way you are going to have to run wires to the speakers. There are wireless solutions out there but you will be loosing a great deal of quality by doing this. The amps on wireless devices usualy arnt as good as pre-amps or receivers.
I have heard of people doing all sorts of things to hide wires to make them mearly invisable.
I would rather see you hide the wires with a rug or trim over them then go wireless. Ask around see if people can post pictures of their solutions.
Best of luck, keep us updated on your solution. Each solution is unique and fun to see.