More nuggets on FCP 6.

Effects
A bunch of the effects have be set up for FxPlug standard, for the same type of RT effects found in Motion.  So, RT, RT, Rt.

SmoothCam
allows the smoothing of shaky footage.  This is going to be great for HD stabilization (where, due to the wide screen aspect ratio of HD, any hand held shots tend to be more nausea inducing than in SD).  This analysis takes place in the background....

Now this is a first - a 'background' analysis (and perhaps render) while you do other work.  Too bad other things couldn't be set to a background render.

RT Color correction
No, I don't mean color - I mean that, like FCP 5.1.2 (but not before) scopes and the 3 way color corrector are going to be RT.

Better Shake integration
Now, as far as I can figure - this is a way that FCP is handling it's XML (and the information on this is a bit unclear)...
But it looks like you can set up an effect, on tracks, say like a Blue Screen on a background, and FCP will pass the clips into shake, where shake will auto build a tree, ready for your to use your Shake Skills.