Just threatening it, will get the result you want. Senate Democrats learned what Robert Byrd already knew:
Under the terms, Democrats agreed to allow final confirmation votes for Priscilla Owen, Janice Rogers Brown and William Pryor, named to appeals court seats. There is "no commitment to vote for or against" the filibuster against two other conservatives named to the appeals court, Henry Saad and William Myers.
The agreement said future nominees to the appeals court and Supreme Court should "only be filibustered under extraordinary circumstances," with each Democrat senator holding the discretion to decide when those conditions had been met.
...."Many of these nominees have waited for quite some time to have an up-or-down vote and now they are going to get one. That's progress," said press secretary Scott McClellan said. "We will continue working to push for up or down votes for all the nominees."