So in a recent thread on the battlegroundforums, as of september 2007 you can still do the shoulder exploit.
Shoulder enchants and whine - Battleground Forums
It's mentioned on page 2 that it is still doable, but no method is given since that results in a ban on those forums. Does anyone have any ideas on how to do it? I gave another test try using the argent dawn resis shoulder enchant, but it didn't work, so I'm thinking there is a new way to do it now?