Thanks to Mac Mini colocation services like macminicolo, it's now cost effective for me to switch some (and perhaps eventually all) of my web sites to dedicated hosting.
So I got an account with macminicolo and ordered my Mac Mini which arrived yesterday.
One thing that I need to experiment with before I send it off to the datacenter is whether I'll be able to remotely manage it effectively as-is or whether I'll need to buy something like Apple Remote Desktop.