"There's the thing...since the Squeezecentre software reads directly from the iTunes library, and utilises all the existing playlists, why bother with the Wadia?"

I don't think it's an "or" purchase. I have two server options, but I also own three iPods. I wouldn't mind having the option of the Wadia for whenever I wanted to use it. Agree though that I wouldn't use it instead of the server options.