>I've been challenged to try to find a bank account; I win the challenge
>if I can wire in $100 to the hidden account. Anyone have any good
>ideas about how to find an ABA number?
This sounds like the "this is your last chance to send me $1!" ad:
Announcing the 'Bank Account' Hack.
Rules: Wire me $100.
Reward: I'll give you a T-shirt.
The *real* challenge will be getting your $100 back.