I use Google Listen, and I could find RPPR on that pretty easily, but the Unspeakable podcast has been another story. Considering I doubt you submitted RPPR and RPPR Actual Play to it, I am not sure why those were searchable but Unspeakable isn't, or if there is anything you (and by you I mean Ross) can do about it. I was able to get Unspeakable into my subscriptions, though, by manually putting it in, so there is that.
Just another option out there anyway.