I thought I would list the parts for my home server. Its been almost a year since I started putting it together, so all the parts seem dated, even the parts I bought new. Not so interesting as newer builds you'll hopefully hear about.
Case: Antec Sonata III
(currently $110 at newegg, often on sale for less, I found it for $90 delivered last year from Outpost.com)
Case comes with a Plus 80 500W Antec power supply, and has lots of drive bays (4 internal, 5 external). Easy to open case, easy to access drive bays and the motherboard is easy to work on. The case looks nice, but build quality is "average", rubber feet only "glued" on, drive bay door is plastic, etc. Power supply is efficient, and reasonably quiet. The case has one 120mm fan, fairly quiet, 3-speed. Two front usb ports, one esata port on front.
CPU Intel E2200 w/original fan (2.2ghz dual core cpu)
(now $70 at Newegg)
good performance for the price, low power requirements, not much heat generated.
1 Gb (2 X 512mb) of PC-4200 DDR2 ram (infineon brand), that I took out of a Dell 8400 desktop when I upgraded the memory in that desktop
16X dvd writer, NEC ND 3530A drive from a Dell 8400, (I had put a lightscribe drive in the Dell, and took this one out)
Bought used on eBay for $80, not stocked by many stores now.
I bought this board because I though it would be easy to set up (it was), it had lots of ports (six sata, two firewire, four USB) to connect as many drives as I might want, had onboard video (used during setup and troubleshooting), and gigabit Ethernet
Two 750 Gb Western Digital SATA 7200rpm drive (wd7500aaks)
Windows Home Server Toolkit
My router is a DLlink DIR 655. Even over the wireless connection, I'm able to stream video's (standard definition DVD's) across my home from the home server.