I too am wondering where my complimentary copy of workstation is. I passed the test on July 31, 2013 and I still haven't received any notification of a Workstation license being available and it doesn't show up on myvmware.com account either. I emailed support about this about a month ago and they said I should receive something in 15 days - still nothing...
I received below response from email@example.com on my Free Workstation key query.
There is currently an overwhelming response of certifications that are being processed and we are currently out of workstation keys to provide to any new certified candidates. We invite you to download the free trial until we can provide the complimentary workstation keys. Please note we are working diligently to have them generated and sent to everyone as soon as possible.