[fowlplay4]

What's a mentor really going to teach a player on UN though..?

Mentor: Oh hey this is the spar, and this is the pk zone, there's also some quests but you're definitely going need to use a website to figure those ones out. Here's some other <random feature of UN>.
Typical iPhone Player: can i be admin?
Mentor: Uh no.. you have to try out and yadada..
Typical iPhone Player: oh..
Mentor: Anyway that's pretty much it, rate me 5 stars please. (Thinking to self.. **** yeah just a few more noobs and I can get that hat)
Typical iPhone Player: ok.

I'd personally opt for more of a checklist-tutorial system with way points and a map that has the player walking around on UN on there own, and allows them to discover each feature without requiring a mentor. While also pushing non-Dev staff to do more and be helpful to the newbies.