I think that this trade is all but dead. Travis isn't the kind of back that Dennis Green wants to see in his offense, he has already stated this and they are looking to shore up their RB needs via the draft this year that is producing a copious amount of stellar ones.
I wouldn' t mind seeing MW move over to LT, however, I just don't think that he has the speed to keep guys like Jason Taylor, Dwight Freeney, or Jevon Kearse off of JP. I think that you may see Jason Peters get a shot at LT and if all else fails, you plug in Trey Teague ( ).
There is now way that I believe that a 2nd round LT can come out of the draft and be successful in his rookie year at the most demanding OL position. OTOH, a center can be replace and asked to start and be more productive than Teague has been over the past couple of years.