Winger Hogan Ephraim has come in on loan from Queens Park Rangers while Dale Stephens recovers from his operation: http://en.wikipedia.org/wiki/Hogan_Ephraim
The loan lasts until 3rd January which suggests that Stephens may be out of action a little longer than was orginally anticipated.
In October there was speculation that he might be joining Palace on loan. However, they needed to get fringe players out on loan to raise the funds which did not happen.
He has also been linked with a permanent move to Nottingham Forest so the 23-year old is evidently a player with some potential even if he is out of favour at the Super Hoops.