[quote name='mr_bungle']Not working for me. I enter my email and it does nothing, and it's not showing up in the regular OR spam folder.[/QUOTE]
I used my PSN email (not sure if it matters) although you will accredited $6.00 to your account after you enter your email address within the VUDU client (no need to perform click verification through email.) Check the bottom right corner within VUDU it should show your current balance.
On a side note, I believe this service is only available to North America users ATM