Roku SoundBridge M1001
Works incredibly well, but unfortunately I work in an area with great wifi that has to be accessed through a \\"permission page\\" on the internet.  I haven't found a way to validate it on the network yet.  At home it's flawless, and the setup was easy enough that no directions were necessary. Interestingly, though I can't access the internet with it at work, it does find other music servers, i.e. other iTunes users.