The Unity Blog has been updated with example of some of the new Image Effects you’ll be able to use in the upcoming Unity3. They have examples of lens flares, depth of field, outline shaders, bloom, sun shafts, lens effects, and many more.
Unity Technologies Blog » Blog Archive » Introducing some of the new Image Effects.
We’re eagerly awaiting this release as well. Seems some of these features will creep-over into the free version as well.