Yeah ... there's a reason I posted my interest the minute I saw it
It took 6 hours to get 6 players for this, and it's unconventional, to boot. I think it's safe to say that if anyone wants to run a 4e game and get players, come to ENWorld
the tiefling shaman doesn't sound THAT far fetched as the little article Lord Sessadore posted mentioned that the spirits that a character channels can really be anything from it's background and sense we aren't going to have backgrounds.. the next best thing I could say is that I channel spirits of infernal beings as I will be playing a tiefling and all heh
Yes, you can use anything from any official published D&D 4e source, even online ones. Of course, that's after you get your random character.
I hope you've gotten accustomed to the ideas of your characters! I don't have the PHB2 yet, but I will have it later today, and start making your characters. They will be posted here when I'm finished, and then I'll link to the game thread.
I'd be interested to be included as well, as an alternate as it seems you are full up. This is a great idea and a wonderful opportunity to play a class/race that as a player you usually wouldn't play.