According to Ballot Access News:
On January 4, an Alameda County Superior Court held a status conference in Rubin v Bowen, the lawsuit in which the Peace & Freedom, Libertarian, and Green Parties challenge the essence of the California top-two system. The judge set another status conference for March 4, and said he is working very hard on an opinion as to whether the case should be dismissed. That opinion will be released before January 29.
Updated January 25, 2013 — The opinion, sustaining the defendent’s demurrer but granting leave to amend on two of the four causes of action, is here.