mtb addict,
Being fairy short waisted, I usually go with a short top tube on my road bikes, and with the drops placing the hands in a more forward position, this might not be as big a problem for me.
Also there is a stem called the "lite pro" stem that also moves the handlebar a couple of inches forward. That and the more forward position of the drops could easily add four inches forward.
Since I'm new here, I can't link to an URL, but google litepro stem and you will see what I am talking about.