2 different blog domains

Hello - I have two blogs with two different domains, and another on the way. I have hosting through GoDaddy. It sucks. It was my understanding when reading your marketing material that the membership would include hosting of multiple sites through Multisites. I thought "sweet! I can host all of my sites through this one company and one install." However, after getting into the trial it looks like that is not the case?

Here is what I think I understand IS the case,.. I cannot actually "host" through MPMUDEV right? However MPMUDEV will help me create subdomains and directories (which I can already do through godaddy) and manage them in one spot right? So not really Multi-"sites" but more like Multi-"subdomains." Right?