I was able to get Debian Etch installed on the server pretty quickly. It's a really base install; the only things that I added were SSH, SAMBA and ndiswrapper for the wireless card.
I broke ndiswrapper trying to get it to recognize my wireless card, and the server itself is not directly connected to the router which goes out to the internet, so technically it is not seen. Perfect.
This means that the ONLY way that I can access the server is internally, which is much better.
This is where my Windows Server laptop comes in.
Since I have a Thinkpad that I use more frequently than this laptop, I have decided to let the laptop take the role of a VPN server. This way, I can VPN into my machine and be able to access all of my shares remotely, and (I think) the only security worry that I have is that someone finds a way to log-in through VPN.
I would like to have the Debian server set up to be the permanent VPN server soon, but that won't happen until I either get my own dedicated connection (I'm using another wireless connection, but I have permission to use it) or get another router that connects to the router with the wireless connection and connect my server to that. Though I really like the idea that my server cannot see the internet.