In my experience, I was able to pay off the charged-off amount and a new account was opened. The limit was the same as the amount charged off.
My credit was also pulled for the new account. This was in December 2008/January 2009. I read on another board that someone was told that they don't rehab anymore. Here's the number I called: 1-800-543-9617 (Recovery Services). You've got nothing to lose by calling and asking. Good Luck!