Yes, it is official.  CREW released a statement today explaining the decision of the Wilsons to appeal the dismissal of the case:

Having had the opportunity to review Judge Bates’ decision, the Wilsons and their legal team have concluded that there are ample grounds for appeal and have taken the steps necessary to seek review by a higher court. The Wilsons believe that this case presents important issues regarding the abuse of government power for political ends and will continue to aggressively pursue all legal remedies. Hopefully, this case will deter future government officials from endangering our national security to further a partisan agenda.

As Melanie Sloan explained yesterday, "we have always expected that this case would ultimately be decided by a higher court."