Cool. I have two SB3s, and would like to get one controller for both.
My primary motivation is to control on one of the SB3s when I have the music piped outside to the back patio. Speaking of SB3 and my patio, I love to show people Pandora on my laptop (WiFi) while having beers on the patio. I explain how it will allow me to create my own stations, and then stream them to my laptop. People are intrigued but expect that the music will come thru the laptop speakers. I then hit play on Squeeze Center, with the volume cranked, and they are quite surprised when the patio is flooded with loud music. My outdoor speakers are well hidden, so people are confused for a while before they figure it out.