Looks like Logitech is finally pulling the plug on Squeezebox. They're gone from their site and have been replaced with the UE Smart Radio, which will use a different server/client system. There's a few interesting threads on the slimdevices forums. Current users should still be ok for a while.
Bye bye UE Radio (if you wish). Hello SqueezeBox. You can convert your UE Radio to a SqueezeBox Radio (gaining all the benefits of SqueezeBox vs UE) by a simple firmware update to the UE Radio. The update to SB is now part of the UE Radio menu.