VMware has released the VCAP-DCA and VCAP-DCD Live Lab Tutorials which can help you prepare for the actual exam.
The VCAP4-DCA is directed toward System Administrators, Consultants and Technical Support Engineers who can demonstrate their skills in VMware vSphere and VMware vCenter technologies in relation to the datacenter.
http://mylearn.vmware.com/courseware/82526/VCAPDCA_Tutorial.swf
The VCAP-DCD is directed toward IT Architects and Consulting Architects who are capable of designing VMware solutions in a multi-site, large enterprise environment.
http://mylearn.vmware.com/courseware/82525/VCAPDCD_Tutorial.swf