Do you remember the username of the other account?
If not, no worries. If you can email directly and tell me what the email address of the other account I can delete it for you.
To email me, go to my profile page here: http://www.cnet.com/profiles/lee+koo+(admin)/ and click on the blue envelope and send me an email on the account you would like me to delete and I will take care of it for you. Make sure to include your other email address, so I can look it up in our system.
I'll be looking out for your email.
CNET has two email addresses for me. Only one is valid but I keep getting email addressed to that one as well as the valid address. I can't find any way to delete the other address from my CNET files and it's a pain.