I realise the timing will be difficult for some (it’s in UK time, of course) and the notice is a little last minute but Groening is one of my heroes and because BBC 6 Music (which is hosting the chat) is all but unknown in the UK there is a good chance you could ask him questions if you wanted to (instead of getting stuck in a queue behind thousands of groupies).
I’ll be asking him about his “Life in Hell” series, which came before the Simpsons and I really enjoyed.