Fast, v. fast the guys at Apple reacted. Here is the e-mail that I got from them a few minutes ago:

Hello Adrian,

I understand that you received an email asking for you to verify information from a non Apple identity. Please know that I can appreciate your concerns. My name is Arrin and I am happy to take a look at this for you.

I have made a member of the iTunes Corporate Security team aware of this site. We would like to extend our gratitude to you for bring this to our attention.

I have included a direct link to the Apple Customer Privacy Policy so that you can be aware of what information we may request of you at any time. I do recommend that you keep this handy should you encounter this issue in the future.

Apple Customer Privacy Policy
http://www.apple.com/legal/privacy/

Thank you for being a part of the iTunes community, Adrian. If I can be of further assistance, please do not hesitate to reply back to this email. Apple is dedicated to providing you with the best possible service.

Sincerely,

Arrin
iTunes Store Customer Support

Please Note: I work Fri – Sat 8:00 AM to 4:30PM EDT

Thank you for allowing me the opportunity to assist you. You may receive an AppleCare survey email; any feedback you provide would be greatly appreciated.

So, in the future be careful what information you give and where.