Sony 16X DVD-R and Seagate PATA 100GB Hard Drive will add more.
Just a note:
The on-board NIC uses a VIA VT6103L 10/100 Mbps Fast Ethernet would not work, WHS does not let me install the driver or even see the NIC, so I drop in a D-Link DFE-530TX+ PCI NIC now I'm on the home network.
Was hoping the put this all into a Small Form Factor Case, but I look at the one I wanted it was big as a small TV, stay with a Mid-Tower Case I had.
Today a week and a half after many configuration reboots, I notice the on-board NIC shows installed and available.