If I recall correctly, all of the stars have signed on to do extras. I may well be wrong, however.
IMO, As the DVDs come out and are mucho-expensive, they will be ripped and compressed and will be shared on Kazaa, IRC... Then the bootleggers will get higher quality originals (not to mention watermark free w/o scene deletions/alterations) and will produce better quality bootlegs.
Question: Why has there been so little (visible) action against these people that sell the illegal 180-episode sets? Will the penalities increase as the authentic DVDs debut?