Is there a way to connect rear surround speakers wirelessly in a home theater setup?

[ForgetCassettes]

I have an Onkyo receiver and I'm expecting some Infinity rear surround speakers to be delivered any day now. I was wondering if there was a way to connect them wirelessly. If so, are there any negatives to doing it that way?
Suggestions on specific hardware purchases will be appreciated.

 

[KLin]

http://www.amphony.com/products/l1520.htm