In order to get academic pricing from Microsoft (I am fairly certain it is actually the same as the Volume Pricing) then you need to purchase at least 5 licenses. That is not licenses of Vista however, that is of any Microsoft Product, in any combination. So you could get 2 Vista, 2 Office, and 1 Home Server License. That will net you the Volume Licensing, or at least that is what the helpful microsoft guy told me. If you spend enough time talking to them, and on their various websites, the prices will finally be revealed to you.