I think that I’ve seen it asked once somewhere at some point in the past, but I was wondering if it’s possible to do Picture-in-Picture with an All-in-Wonder’s tuner and Video-in.
Can you have the tuner be one source and the composite/SVHS be a second one?
No, unfortunately that's not possible, as the Theater 200, that is responsible for processing the inputs, can handle only one at the same time. PiP is possible when using one of the slightly older TV Wonder (Pro) cards.
I was afraid that was the case (though their two video sources, they use the same hardware). I guess it’s not a surprise either since you can’t even use the radio tuner and the tv tuner at the same time.