I use my iPod to connect to the wireless netwrok at work. There is a rotating key which changes periodically. I can't find a way of changing a key for an existing connection. Is there a way to do this, short of recreating the connection?
No, sadly, there isn't. You'll have to go into the wireless network under Settings -> WiFi and tell it to "Forget this network" and then set up the whole network all over again.