Quote - The only sure-fire way to make sure no one can save your art is to not put it online.

Absolutely. Regarding disabling the right click:

Ironically enough, I only ever use the right-click option for images to see the image's properties.
When I want to save an image, I simply drag it from the browser to my desktop or another folder.

AnyHOO, viewed images always appear in the caches of both IE and FF... 
So those scripts blocking right-clicks are annoying and pointless.