Server Specs

[King, Michael]

We're going to be setting up a few new FreeRADIUS servers on virtual
hardware.  The server admin is asking me what I need for specs.
(Virtually, they can allocate whatever I need)

It's about 200-500 simultaneous authentications. (This is my prediction
for the next 4 years, we're about 10 right now).  Using NTLM-auth to
talk to Active Directory, and performing PEAP.

I'm guessing 1ghz of cpu, 512MB of RAM, and 30gig of HD.  Suggestions,
comments, criticisms?