Thanks to free101girl (and welcome to FlyerTalk, by the way) for tipping me off to the foodbank taking the bags of cereal sans boxes. I hauled my load of cereal over to Westside Food Bank today and the man there was happy to accept them. He said someone came in yesterday with 300 bags. (I wonder if it's a FlyerTalker...)
The sale is still on today $2 a box at Vons/Pavillions and $2.29 at Ralphs. What Ralphs has done, though, is substitute 16 ounce boxes for $2.29, compared to the 20.4 ounce boxes that Vons has. Unfortunately the 16 oz boxes don't have the Eet and Ern codes (sorry LibraryDragon).
I got caught today at Vons buying 10 boxes. The checker told me exactly what was mentioned above--only 3 coupons are doubled. So the rest were singled. So I believe they're wise to us...at least some checkers are.