I also wanted to use my Nokia E61 as the itunes wireless remote control using sailing clicker via bluetooth or WiFi so that I could control the songs playing from my couch, patio,bed, etc..
I came across an easier and maybe less expensive alaternative..EOS wireless sells a home wireless speaker system for your ipod and other audio sources..the site states that is broadcasts cd quality audio up to 150 feet and can be expanded up to 4 wireless speakers.. the Core system retails for $300 which includes the base station and one wireless speaker each additional wiereless speaker retails for $150 so for about $750 you could have a multi room speaker system for 4 spaces which isnt bad if you consider a few things..
-If you move to another home you take this multi speaker system with you
-You can stream not just from your ipod, you can plug in your XM radio, mp3 player, or computer
Even though I would spending about the same if I deployed my inital "system" to match EOS (4 airport exprees @ $99 each=$400 and lets say that a decent powered speaker is about $99 each that would add up to $800) but a few setbacks is that I would only be able to stream from my itunes on my Mac so I could not play songs from friend's libraries if they brought their IPODs over.. and the EOS system is also more portable in my mind..with my "system" I would have to plug the airport express but also the powered speaker into an outlet..where I wpuld only plug the EOS speaker wherever I want it..less cables, less mess, less bulk.. seems like sharper image stocks this so check it out.. it gets my vote..