No, AMW was a safety in HS and moved to LB, ala Kevin Burnett. He won't be moving back. It won't be a logjam, or at least I don't think so. Walker and Williams can play DE while Hawkins could be RB or S. I expect Frazier, Williams and Hawkins to RS anyways. Our depth chart will look like this in 07/08:
SLB-Karl/AMW/Thompson
MLB-Mayo/Wilson/Walker(unless he moves to DE)
WLB-McCoy/Donald(or Davis)/Davis(or Donald)
In 08/09 we are looking at basically the same except Karl won't be on there and I expect Donald to be starting. It could get a little jammy, but not a big problem since I expect Walker or Williams one to be a DE, and, at least, 3 of those guys will only be redshirt freshmen.