You may still be able to submit product enhancements via the older link posted above. However product enhancement has now been switch to a more interactive portal called "Ideas" located to the right of the group tab on this page. Ideas gives users a better way to voice their opinions on certain product enhancements. It also lets Symantec know exactly which product enhancements are more important to users via a vote system. So go check it out and post your idea. You will get a good response from other users about whether or not they would like to see it implemented too. Also you can see the current status of any given idea ie) whether it is reviewed, in the process, implemented, coming out in the next release ect. I think it is much better than the old product enhancement. Hopefully you feel the same.
Grant-