One pain point with Configuration Manager 2007, was that when a package failed to distribute content to a distribution point after the retry count was exceeded, it was permanently stuck in a distributing state. There was no easy supported method to redistribute that package to a specific Distribution Point.
Now in 2012 we have the new option to Redistribute a package.
Open the properties of any application or package and click on the Content Locations tab.
From there you can either select a specific Distribution point or a Distribution Point Group. see Figures below
then Click on Redistribute
Click OK on the Warning and the package will then redistribute the content to that DP or DP Group.