Thanks for this quick response and helpful information! Couple more questions.
1. When you say free , is there a specific version of ESXi (4 or 5) that I would have to download? If so, what/where is it?
2. Let's say I place the ESXi 4 on this host, could I connect it to a vCenter Server (we have a license) and place it into a cluster? Or is this not possible with the free version?
3. Last question, is there a free version of vCenter Server for ESXi 5? Or is only the hypervisor free under these hardware restrictions?