Fringe: The Complete Second Season is now available for pre-order on Amazon in both Blu-ray and DVD formats for $48.99 and $41.99 respectively. The release date has not been announced yet, but it is estimated to be sometime in September.
BTW, one of the nice things about pre-ordering through Amazon is that you are guaranteed the lowest price, even if the price drops between now and the release date. Plus, either edition should qualify for free shipping, and you don't get charged until it ships. They even ship it out early so you get it on the release date!