My son's I-485 just approved several minutes ago!

I just checked the online status, now for my son's case, it says:

Current Status: Approval notice sent.

On October 25, 2007, we mailed you a notice that we have approved this I485 APPLICATION TO REGISTER PERMANENT RESIDENCE OR TO ADJUST STATUS. Please follow any instructions on the notice. If you move before you receive the notice, call customer service.

But it doesn't say anything about card production. Probably they do need a FP code 2 for card production later on as people here said.