How long after a bankruptcy (chp7) do major CC companies (ie AMEX, Citibank) grant credit again?

I heard even after 3 years, and diligent credit rebuilding these CC companies still deny credit (back above 650 score). Since BKs stay on the credit report for 10 years this sucks. Any experienced people or credit industry experts know the real answers? http://bit.ly/lj1WmR