Was asked another curly question about Licensing on Friday, and was reading this during my daily reading about Internet facing (MOSSIF) sites and requiring CALs for internal connections. Basically, you weren't allowed to deploy an Intranet and Extranet in the same SharePoint farm because of licensing.

CodeJedi.net has posted a new article stating that the licensing has been reworked to allow a deployment of an Internet Site onto a single server for authoring (staging) and presentation. Tom Rizzo explains more here.

More can be found on the licensing FAQ and product list.