There is an new Symantec page for malware submission, Threat Expert, and we encourage advanced users to try this new page. Below are the available pages for malware submission, and what you should expect:
http://www.threatexpert.com/submit.aspx - use this submission page if you would like a quicker response on your submitted malware. It also provides a place to track your past submissions
https://submit.symantec.com/retail - use this submission page if you would like to pass along malware information to Symantec without an immediate follow-up