This has been one of the most fun recent everything-is-now-connected experiences: after upgrading into a Spotify Premium account, I first did find out that Spotify has a very nice mobile client for iPhone, then that there is also a plugin (still at beta though) to make Spotify work as an online radio component in my Squeezeserver/Squeezebox setup at home (making possible somewhat more hifi experiences in our library room). The only issue was the UI, and seaching for music with our trusty old Squeezebox Classic and its rubbery remote control was not so much fun. Here stepped in iPeng, an application that turns iPhone into a Wifi remote that makes browsing and playing Squeezebox’s music collections really fun — and it suits perfectly for remote controlling Spotify, too.
The only real irritation so far has been “no player connected” message that comes when the connection between iPhone and Squeezebox is lost. I have tried to set iPhone into a fixed IP address in our router, and also limit its connection into Wifi g standard only (which should make it supposedly more resilient to disturbance), but I am not sure I have managed to crack that problem completely yet. But otherwise: it is great to notice it is possible to get things — music, services, hard- and software — to interoperate, finally, at least to a certain degree.
frans goes blog 
It is also so much fun to find all these podcasts and online radios, simply by skimming at the touch interface.
It currently looks like the right solution was to “fix the line” also from the iPhone end: you need to tell the phone to forget all local Wifi networks, except the one you use to link with the Squeezeserver, and the player. At least now my remote appears to stay solidly connected.
Are you able to search artists on Spotify through iPeng? Because that’s the one thing I still miss now.
O, forget what I just said, it was a question of restarting. It’s perfect now.
Ok – great that you got it working. 🙂