Sorry CJack, but I'm gonna have to disagree with you on all the points that make you seriously sound like Debbie Downer. These guys don't just do the parody stuff, they also have a pretty tight group within the voice actors that plays Left 4 Dead 2 and Halo: Reach together (which is also posted on their site, under "Team Four Star: Let's Play" in the Episodes section, and yes, sometimes they do the DBZ voices).
As a 29-y/o gamer, I know that getting together a good team to play campaigns with is really hard to let go. Also, just because you grow up doesn't mean you give up shit you love to do; it just means that instead of it being the only thing you do, it becomes a hobby that takes up your time when you're not working or otherwise having a life.
I don't mind waiting for the new episodes (though I would like to point out that the wait time between Lord Slug and Ep 26 was only a month); they're fun to watch when they do come out, and the "TFS: Let's Play" segments can be pretty hilarious all on their own. TFS is comprised of a bunch of guys who have fun doing things that are otherwise ridiculous, both for their own amusement and the amusement of others, and that's why I keep watching.