As I was at my local grocery market today, I found an interesting Episode 3 product tie in. Cheez-it's now have a "Limited Edition" Episode 3 Packaging on them. On the front is a picture of R2-D2, and on the back is a collage of E3 characters, as well as a short description for the final Star Wars movie. Beware, the description might be spoilerish to some!
Also of note is that on the side panel is an offer for an E3 poster. The poster is of a close-up of the Vader mask, with the Anakin vs. Obi Wan duel being reflected in one of the eyes. It is $2.99 with 2 UPCs and the order form which is located inside the box. Click on the images below to check it out. Beware, the one marked spoiler is the one with the readable text, so some may want to avoid it: