A lot depends on how many nodes need to be messed with. If there is only one or two, just manually change the creation date (under "authoring" in edit).
If you want the users to be able to do this on a regular basis, look to one of the modules mentioned or a custom view.
Keep It Simple....
From: "Hummel, Tracey S - (thummel)" thummel@email.arizona.edu
DraggableViews module gives drag/drop reordering.