They could get in a couple of ways.
Beat LSU and Arkansas, then reach Saturday in the SEC Tournament, and I think they are in.
Beat LSU and Arkansas, and have us lose to Auburn and Tennessee, and I think they have a shot.
Ole Miss' danger is, short of winning the SEC Tournament, anything they do is going to make them one of the last few teams selected (while we can play ourselves up to a solid 9/10 seed). Ole Miss is an 11/12 seed at best. If a lot of upsets start happening in conference tournaments (especially Horizon, MVC, Pac 10, WCC, A-10, CAA, where there are guaranteed at-large bids), they would be one of the teams in danger of being knocked out.