The sale is mostly complete, the terms of the sale are described in the Purchase and Assumption Agreement dated September 25, 2008 between the FDIC, as Receiver, and JPM. You can read this agreement by accessing the FDIC website provided above. The agreement terminated after six years, but some provisions are still in effect.
AND
If the FDIC, as Receiver, of Washington Mutual Bank has excess assets from the liquidation of the bank, distributions can be made to certain parties in accordance with the priorities established in 12 U.S.C. § 1821(d)(11)(A). The FDIC, as Receiver, anticipates that it will make a final distribution at a later date.