[ActiveDir] OT: Are MS Sharepoint CAL's good for multiple portals?

[J B]

I tried this question on the Sharepoint Newsgroup with no luck on responses.  I'd like to know if MS Sharepoint CAL's will cover multiple portals on sharepoint.  We are thinking of using sharepoint for our company intranet (we already use it for an extranet) and want to make sure we are covered if we go that route.  Does anyone know?