The EDSBS Buyer's Guide goes over three of the SEC's big rivalry games this weekend, and it's a highly recommended read as always.
Left out, though, is the Egg Bowl between Ole Miss and Mississippi State. I happened upon this article earlier today, and it's a fascinating read if you're not familiar with the history of the rivalry. It runs about as deep and is as heated as anyone else's rivalry, which means there are some great stories in there.
It's a bit dated (published 2003) so it doesn't get into the brewing hate between Houston Nutt and Dan Mullen, but it's still worth your time to get acquainted (if you're not already) with one of the South's great rivalries.