Love, love, LOVE this idea. I fall somewhere in the middle of "newbie" and "mentor," meaning I've got three capped toons and have done a fair number of epics and raids but still feel I have a lot to learn and in general wouldn't be comfortable leading any of them.
This is such a great thing to see, as I've been noticing more and more elitism. I recently got turned down for a PUG and dissed simply because the party leader thinks that everyone in my guild is a crappy player (really, more than 200 people and they're ALL crappy?), and general chat is full of people making fun of newbies for asking the kind of questions that EVERY newbie asks. I would love to participate in this in any way I can.