To be progressive is to move forward...to progress.
It doesn't determine the direction of progression.
Some use it as a more politically correct version of "liberal," but you don't have to be "liberal" to be "progressive."
Republicans can be progressive; I'd suggest that the Bush administration has been aggressively progressive.
Fascists can be progressive.
RW fundamentalists are progressive.
And blue-dog, corporate, "centrist" democrats are aggressively progressive, if the movement of the Democratic Party is any indication. The DLC is progressive. That's why their think tank is "The Progressive Policy Institute."
Obama is progressive. He's moving forward with his version of "change."
As a matter of fact, everyone who doesn't want stagnation is "progressive," no matter what kind of "progress" on what kind of "change" they are working on.
Since the term can be accurately used to describe progress that has nothing to do with democratic principles or ideals, I think that Democrats should drop the term for something more accurate.
"Liberal," "Left," "Centrist," "Right," are more accurate.
It's time to stop using the word "progressive" as synonymous with the liberal left--it's not.