I have no idea, and I don't know if you are going for just the speaker placement or true wireless speakers. I do have an idea if you want unlimited placement. If you have enough stuff lying around, you can actually pull it off on your own. What you need is the following:
An FM transmitter (they have them at Best Buy)
Battery or power source for transmitter
An FM receiver (walkman or portable stereo with a headphone out)
Some 1/4" wire to connect from your output source to the transmitter.
Ok. Connect up the transmitter to the wire and the wire to your output source. Then place your speakers and receiver anywhere you want and hook the speakers to the phone out (assuming these speakers are better than what's on your portable stereo).
Now, tune the stereo and transmitter to the same frequency. In theory, you should have a wireless setup.
I don't know if this is what you are trying to do, though, but if it helps, let me know.
what im trying to do is the following...
i have home theatre system im building but i hate having wires all over the place
i remember seeing something where u attach one peice to the receiver and one to the speaker and it makes it wireless
dunno