OK, try this... get yourself a small board (2 PCI slots) one slot goes for the net adapter. The other one goes for this....
http://www.staples.com/Catalog/Browse/S ... =im1169770
The problem is the NAS software at the momment is only setup for 4 drives, but a bit of tweaking I imagine it could do 8 just fine. I have a card similar to the one above lying around here somewhere my current system for NAS is an HP Pavillion 6746 will have to find some small drives and play with it.
**Will have torip it open and see what exactly is what in this, I know there are a few menus I wouldnt mind reoganizing or clearing up.