I'm running Vegas 8 Pro and I'd like to introduce some motion blur into picture animations to take out the jittery movement as I pan and zoom. I haven't been able to figure out how to make it work and would appreciate any help you can offer.

There's only one way that I'm aware of to get motion blur.
View > Video Bus Track.
Right-click on this new track and choose Insert/Remove Envelope > Motion Blur Amount.
You'll see a thin (light purple?) coloured line at the bottom of the track.
Drag this upwards to increase the amount of blur.
The line can be keyframed just like an audio event.

Thanks Mike, I'll be trying that later this weekend or early next week.