Does anyone make wireless rear channel speakers?

I am renting short term and would like to know if there is an inexpensive solution for wireless rear channel speakers. I cannot run wires without much difficulty and since we will only be in this apartment for 6 months it is not worth it.

I don't know what kind of quality you need, but I've seen Acoustic Research and RCA wireless surrounds at less than $200. I know nothing else about them. Sony offers various similar permutations, I think, as well as a more serious Home Theater system that features an entire set of wireless speakers. I seem to recall that it got a lukewarm reception for sound quality, but memory fails a bit.

Ed