VMware have now finally announced the exact dates as to when the new VCP on vSphere 4 exam will be available, both in terms of registration, and taking the exam.
Registration through Pearson VUE opens on August 14th.
The first date the exam can be taken is August 25th.
If you're lucky enough to be going to San Francisco for VMWorld, you can take it there and enjoy a discount too!
Here's the link that confirms the above dates: