there are 2 levels of this in PI.
1st is the Blink process, where you can load up your images and animate them. you should be able to spot bad frames this way. Blink will let you select some number of frames and copy or move them to another directory.
2nd, in 1.8RC7 there is a script written by mike schuster called SubFrameSelector that will take all your frames and analyze them for many different metrics, then either copy or move accepted frames, or copy or move rejected frames.
there's actually a couple of good threads here on SFS, so just search the forum for SubFrameSelector and you'll get some hints about how to use it.
rob