Jonathan Capeheart has a useful post explaining why the House leadership's decision to introduce its own DADT repeal legislation will shorten the amount of time the Senate needs to get it passed. But I think he's being a bit naive about the politics of repeal through the courts here:
If vocal opponents, such as Sen. John McCain (R-Ariz.), succeed in standing in the way of the the president, the people and the military, then they better be prepared for the tsunami of criticism that surely will come their way when the courts bring an abrupt end to the discrimination they fought so hard to maintain.
The winners get to write history. If DADT repeal succeeds in Congress, those who attempted to stop it will be remembered as bitter dead-end obstructionists. If, on the other hand, repeal is blocked, it will be remembered as a tragic example of Democratic weakness. By the time the courts overturn the policy, Republicans will have effectively changed the conversation from the nonexistent merits of DADT to the activist tyranny of unelected judges. Whatever chaos it causes for the military will also be blamed on the failure of Democratic leadership to get the law repealed when they had the chance or on the administration's efforts to repeal DADT undermining its ability to defend the law in court.