My addon for that (I forget the name of it off hand) tracks it via the INSTALL of wow. What I mean to say is all I have to do is from my main install log onto all my toons and it records what I have (I have to open their bank and mail as well). So about once a week I do that. (It also keeps track of money). It's not an up-to-date exact count of everything but it does help some.