Here's a quick explaination of how I was taught:
Duplicate the video layer where the blurring needs to be done. On that layer, put on a Gassuian Blur. Then, create a motion path for cropping. Crop around the blurred object and go frame by frame and keep cropping around the image. It may sound complicated, but it's pretty damn simple.
Now I'll pimp out my camera on sale on eBay... I need to sell this damn thang!
http://cgi.ebay.com/ws/eBayISAPI.dll...tem=3845099755