"Has anybody tried signing up for any of the big bonus/rewards cards with a younger person as primary and a co-signer?"
That would help me as well, as I have my parents to co-sign. I am pretty much done with school, 23 or so, but do not have big balances. I am ready to put a $2700 put on a card immediately.
And what about those SPG Amex, you think I won't get approved?