I didn't see it mentioned elsewhere, but Rivals' position rankings look like they've been completed. Greg Brown is the #34 cornerback and a 3-star. That seems about right to me.
4-stars: Beyer, Hollowell
3-stars: Rock, Brown, Conway
For what it's worth, Valdez Showers is the #30 cornerback and a 3-star on their list. For people who put a lot of stock in Rivals rankings, maybe we should start pushing harder for guys like Showers and Raymon Taylor (a 4-star, #246 overall, and the #29 athlete).