Is there a reason you didnt mention coinbase in your reply in my thread?
Well, they use the ACH network to transfer funds from your bank account. This is the same method that PayPal supports (by linking your bank account), and Dwolla, Serve, etc. all use the same method. You had said no ID, and a bank transfer implicitly has your ID (as the bank has your ID associated with your account.)
Derp, my bad. Thank you!