Microsoft Office 2007 Terminal Servers Licensing Requirements

If I have a Terminal Server that is accessed by 50 users, how many keys do I need for all users to have access to Microsoft Office?

I know that only office editions with VLK will work on Terminal Services, but I don't have any experience with VLK's and the information I find on the Internet isn't giving me any kind of concrete answer.

Currently I think the answer is that I need 50 VLK's, and I really hope that isn't the case as the price is quite high.

From serverfault Beuy

• Each client needs its own license. If you already have an open/volume license for their desktop/notebook, you don't need additional licenses for the terminal server.

  Beuy : The clients only have OEM licenses.
  From Greg Askew