All right; time to talk about Gandalf and the house side of the network equation.
Gandalf the White:
The old ATX tower case I'm using is from an old Gateway PC; it's got 4 external 5.25 in drive bays which hold a number of DVD/CD drives, only two of which will be hooked up. To this, I have added an Antec VP450 450 Watt power supply, an Asus/HP M2N68-LA motherboard with an AMD Sempron 3400+ CPU, and a 500GB Seagate Barracuda SATA hard drive. I may disable one of the DVD drives and use an 80GB Western Digital Caviar IDE drive as the boot/OS drive and leave the whole Seagate for the media storage; I haven't decided yet. I will be using the integrated LAN connection to connect to a Linksys E2500 router that will be flashed with the DD-WRT firmware so I can create a wireless bridge network; a similar router will be installed in the 2004 Trailblazer so that Frodo and Samwise can be kept updated.
This computer is simply going to be a media client, but it's built around an older eMachines system, with RAM and HD changes that I made to improve its performance. It will be connected to the LAN on another Linksys E2500 that is the main access to the internet for every other computer and wifi device in the house.
My own personal system, which is where I am doing the preliminary testing for the CarPC front end I will be using in my vehicles. It is connected to the LAN via wifi full time, as I don't much care to wire the room for a LAN until I'm ready to remodel the house.