I have the Belkin ScreenCast AV 4 that I planned to use and never got around to use it.
It is brand new but I don't think it is still under warranty. I have bought this nearly 2 years back but never opened it.
If you need a HDMI wireless solutin with Dolby 5.1 surround sound etc.. this is perfect.
Check this link for details on how it works
If you are interested, please PM me and I am in Auckland and you can pick up or I can courier.
I am really not sure what it is worth now. Amazon has them at 200 plus.