The public certification exams for SharePoint 2013 will not be available until the first of the year. But… new for the SharePoint Server Administrator is the requirement to be “MCSA: Windows Server 2012” certified. (details here: http://www.microsoft.com/learning/en/us/certification/cert-sharepoint-server.aspx)
This is going to be a surprise to many SharePoint admins and something they need to get working on if they plan to be SharePoint 2013 certified. Existing SharePoint 2010 “MCITP: SharePoint Administrator” certified folks can upgrade by taking Exam 417.
The following classes are available to help get your there: 20417A: Upgrading Your Skills to MCSA Windows Server 2012 (5 Days) or 20410A plus 20411A plus 20412A (15 days total).
Here's the links to the exams:
70-410 Installing and Configuring Windows Server 2012
70-411 Administering Windows Server 2012
70-412 Configuring Advanced Windows Server 2012 Services
70-417 Upgrading Your Skills to MCSA Windows Server 2012