Previously the only VMware certification exams were VCP (VMware Certified Professional) based on VI 3 or vSphere 4.

VMware Education have just announced the VCAP4 (VMware Certified Advanced Professional) exams which will be available from July 12th 2010.

There are two seperate exams:

VCAP4-DCA Datacenter Administration

VCAP4-DCD Datacenter Design

This is the next step after VCP4. VCAP is an intermediate level certifcation more details here: 

http://mylearn.vmware.com/mgrReg/plan.cfm?plan=16548&ui=www_cert