Tricks of the Trade is a great idea.
A tip for listeners: when having a call-in contest, radio hosts prefer winners who sound excited. So if you call a station and sound fun, there's a better chance of not only winning but getting on air as well. The whole "caller 9" thing is mostly a filtering trick, allowing the host to tell boring-sounding people "you're caller number 7, sorry."
It's run by everyone's favorite defective yeti.