Who stands to lose the most here?
It seems to me that Net App stands to lose the most if the verdict goes against them. If Sun loses ZFS, then it can easily dip into its cash and get back to work on its other clever ideas. Maybe it can push its new parallel Lucene file system instead? But if Net App loses this case, then it's "so long and thanks for all the fish". If I were cynical I would think that Sun almost wanted Net App to initiate this action so that it could fire a salvo of patent claims against it and appear to be the victim at the same time. For Sun it's all win-win.