Teams in this position always lose in terms of asset management. There is not enough ice to showcase the surplus of defense so you end up getting prospect prices. If you can anticipate the logjam in advance you are best to try to make at least one proactive move. None has been made so far.
At this point, unless someone really likes Schlemko or Stone or Rundblad, Klesla is the only really known quantity that any team would be willing to give up something of value. That's assuming we keep OEL, Yandle, Morris and Michalek. Guys like Summer will likely end up staying just because they get lost in the bunch and you'd pretty much have to give them away.
I was all for getting Z back last summer, but when you look at this logjam on defense and his salary it's easier in retrospect to look at that move and see that it only makes things more difficult now. We really have to move 2 defense this season (by the draft) and that money could have been used for some additional offense.
I suspect Summers ends up making NHL money in Maine and they find a deal to get Klesla dealt.