I can't seem to find much info about animating a Sprite (physicsObject). 

Let's say for instance, in my game I have created a userControl called ucPlayer.  During the initialization of the game, ucPlayer gets added to the physics controller (in code).  During game play, when the user hits the left or right key, I want the ucPlayer to flip to the left or right or do some other interesting animations for other reasons... hands up/down, etc.   In a perfect world, I'd like to be able to create Storyboards for each animation that could then be applied to ucPlayer from code (fire the Storyboards as necessary)... but I believe Andy said in an earlier post that there may be no way (easy way) to do this.

Ideas?  Any help would be appreciated.

There used to be big limitations on what Storyboards were carried over to the physics controller. But in newer versions, most Storyboards should come over OK.

Place your PhysicsObjectBehavior on a Canvas inside your UserControl. Make sure your Storyboard is animating items inside the Canvas. And you should be OK.

A word of caution though - on WP7, Storyboard animations perform horribly!! I usually do little tricks like turn off Storyboards when I can, or use programmatic animations inside the timer loop instead of SB's.