I think Johnson will be ready, he'll get some help from Allen and/or Rivera, and most importantly, Bledsoe will hit Whitten/Campbell/Johnson/Jones over the middle and this will help keep Trotter back in coverage.
I hope this is the last year we have to worry about Al Johnson or Andre Gurode at at Center. Hopefully we get a good center in this 2006 draft. Center is the weakest position on the OL easy.