As far as I know, here we have the first instance of a SEC official confirming reports of the Missouri Tigers making moves to join the SEC. Multiple SEC administrators, athletic directors and coaches have commented contrary to Mike Slive's line that the league is happy sitting at 13 teams, but none of them have specifically remarked in the positive regarding Mizzou.
Here's LSU chancellor Michael Martin, noted around here for his #realtalk propensity:
The West Virginia Mountaineers will reportedly declare for the Big 12 on Wednesday. If they're really waiting on Missouri to decide before taking that leap, then the Tigers could announce Tuesday night. If, if, if.