well they are releasing the two disc set plus scrap book box set with two animated features from RGB, at certain stores (suncoast I know of but not Best buy) if you pre-order you will get a 5' Stay Puft Marshmellow man figurine- if you pre-order by today.
It's pretty cool, sketchbook is nice but you get the same sketches in the dvd special features, with more sketches too.
The two cartoon episodes are Citizen Ghost and Partner in Slime, both chosen for the fact that they each mention one of the movies specifically. The first one talks about Gozer, and what happened right after the first movie. And the second episode Peter must pass as a ghost so he gets covered in the same goo that is seen in the second movie.
The movies are in very nice quality, although part of the movie does seem to be cut off. Although it is in widescreen, it seems that even on my big tv there are still parts cut off. The montage where newspaper headlines flash by, parts of the headlines are cut off.
I give it a thumbs up, and it's so cheap. I thought a box set like this would cost around $20 at least.