Pandora music

We have surround sound in our home and would like to be able to play Pandora. We have WiFi in the house along with both PCs and a Mac with iTunes, etc. on the network. The available ports on the home surround sound do not support an optical connection. What options do I have to be able to connect and wirelessly play Pandora via our home network? Also, we have iPhones so it would be great to be able to have an app where we can control Pandora, etc...as a remote via the iPhone...