I think this is the end of the line for DADT. Anyone who is waiting for congressional action to make it "permanent"...don't hold your breath.
First of all, Democrats probably aren't going to have 59 Senate seats in the lame duck Congress. Since Illinois and West Virginia are special elections, the winner of the Senate elections in those states (both currently rated as toss-ups) will be seated IMMEDIATELY. So realistically, the Dems will have between 57 and 59 seats.
Secondly, Congress can use this as an excuse for inaction. Some politicians may disingenuously argue "Why do we still need to repeal it when the courts just overturned it?" as though they actually agreed with the ruling. Or they'll suggest that we wait for the appeals process to finish before we act...the same stalling technique they've used to wait for the military report.
Speaking of which, the military report is due out on December 1. Even if the overall report strongly suggests that ending DADT wouldn't cause any problems, anyone who is looking for a reason to vote against repeal will surely be able to find something to support their case somewhere in the third paragraph of the 57th page of Appendix B. They will latch onto anything remotely related to their case as evidence that we need DADT. Surely they'll be able to find something.
So yeah. It looks like DADT will finally meet its demise in the courts. Anyone looking for a congressional showdown, expect to be disappointed.