My iRadio loses contact with TwonkyMedia after about an hour or so.
I am using wpa wifi from a Linksys router running Talisman.
If I turn off the radio using the mains switch at the back and turn it on again, the radio starts up and gives a message which says, "Assigning network address ... " which then appears to freeze. I then switch off the radio using the remote, then switch on again and Twonky is there and works well.
However, an hour or so later without use it seems to disappear again. The previous procedure brings it back.
Incidently, the radio always shows Azureus as a server.