I am full on the Mendenhall pick, but it's looking more and more like he won't be around for the 18th pick:
http://sportsillustrated.cnn.com/2008/writers/don_banks/02/26/mendenhall/index.html?eref=T1
"He reminds me so much of Amobi Okoye last year,'' said the personnel man. "At the beginning of the process, we didn't really know much about either one of them, other than they were really young. [Okoye was 19 at last year's combine, Mendenhall is 20.] Then you watch some film, and you go from thinking of them as a first-day pick to a first-round pick. Then you get to the combine, get a chance to talk to them, and now it's first half of the first round. Then they have great workouts, and you realize they're top 10 picks. The same thing that happened with Okoye is happening with Mendenhall.''
http://sportsillustrated.cnn.com/2008/writers/don_banks/02/26/mendenhall/index.html?eref=T1