I'm dissapointed there isn't much that ever happens in terms of in season NFL trades (as compared to baseball and basketball). Usually there aren't any that happen of significance, and every other year or 3 a trade of significance happens midseason, this year it's already happened with Harvin. I doubt we see another move of significance.
Although if Jackson could be had cheaply, I could see a contender making a move for him (especially if he can be cut/restructured easily this offseason). Maybe a team like Cleveland who wants to push for the postseason, and pairing him with Gordon for the next couple years could prove highly beneficial.