I usually don’t blog politics so I’ll address the general procedure The Court follows when in session.
The justices meet each Friday to discuss cases they’ve heard that week and informally take a vote. The senior justice of the majority side selects who will write the majority opinion. Likewise, the senior justice of the minority side decides who will write the minority opinion. The junior justice takes the notes. The decision is provided to each justice but not publicly released until sometime in the future. Any justice can change their vote at any time prior to the decision being made public. Only the justices and their law clerks know the vote tally and do not “leak” information.
I understand that oral arguments heard this week will probably be made public no earlier than the last week of June 2012.