Hmm... $499 for 60GB fully BC or $499 for 80GB, partial BC and a game. LOL. I think that'd be a pretty easy choice. I would hope that remaining 60GB stock would drop to $450. I know that the last time I was in my area Wal-Mart they still had a few.
I guess if it was me, I'd pay for the full BC (I did already, although I didn't have a choice at the time). The average consumer probably won't understand the difference, though... they'll just see 20GB more and a free game...