I'm sorry to hear it too. I've listened to every single episode of The Sofanauts and always found it enjoyable and inspirational. The same goes for the old StarShipSofa Round Table episodes. But I can also see where you're coming from regarding live discussions vs. flying solo. It's just not for some people and I probably wouldn't do it myself without a beer either.
Tony, I've always been fascinated by your ability to work full time (shifts, no less) be a father, stay up to date with your SF reading AND put together all these regular podcasts. So no need to feel bad about dropping one of them. That said, if you ever felt like handing it over to someone else, or putting together a Sofanauts special just once every now and then (in the main SSS feed) then I wouldn't mind that either.