In my country it is common to blur a car's license plate which is involved in an accident when broadcasting it. Is there an easy way to do such a thing in Vegas and if so how do you do that? I'm using Vegas 8. Somebody maybe can help?

go to www.jetdv.com :: Index (http://www.jetdv.com) that's Edwards site and look up Archive newsletters Vol 1 #12-it is an article that will take you step by step thru blurring a plate, a face or anything else.
Registration is freee and simple.

Masking is the way. Keyframe the mask for the entire period required. U are basically cutting a hole to show the layer below. Duplicate the layer without the mask and apply a blur.