TYP, have you considered making a facebook page for Radio Trivia like the one for RFN? I've been posting links to some of the episodes, but be willing to suggest it to friends.
I've normally listened to the latest Radio Trivia episode before the game selection is revealed on RFN; I haven't been spoiled yet! Mostly because I listen to podcasts when I run or work out, and RT is usually pretty great for running.
As far as the facebook site, I certainly don't know what future plans the hosts have, but it's not like they have a whole lot of exclusive content there. After all, I'm sure that the goal is to provide content that would attract people to the show and NWR in general, not the other way around.
As far as the digital distribution discussion goes, I don't see Nintendo embracing it at the outset, either. Like it or not, the demographic that prefers digital distribution still makes up a minority of Nintendo's target audience. A lot of the consumers are still parents (or others) who will still prefer to purchase something tangible, so that they can give it to their children as a gift. Just because I hate the clutter that collecting generates, I generally prefer getting stuff digitally, but it's still a difficult mental/psychological barrier for my family to overcome. Even my wife doesn't prefer giving me a digital copies games or movies. ...and to be honest, if I were to give a movie or a game to my (almost) 3 year old, it's going to be in the form of a disc.