Of possible interest to anyone who's looking for the 3-disc version...
I was in Wal-Mart (in Manassass, VA) tonight, and they had several rows of the 3-disc edition on the "New Releases"(?) shelf up by the register. Price was $19.96.
More than I wanted to spend, but this is one of the few titles that I actually want all of the special features on, and I missed it before waiting for a better deal. So I grabbed one. Don't know how YMMV it's going to be, but if you're looking for it, it may be worth checking your local Wal-Mart.