I am building, a Biggey.

13 Maxtor 120GB 7200RPM drives.
1 Athlon XP2100+
3 PC2100 512MB for 1.5GB Memory
1 Asus A7V-266*
A video Card
1 Intel Fiber GB Enet Card
2 Promise SX6000 6-Channel Raids Controller
      2 PC100 128MB DIMMS for cache
1 Antec SX-1200 Case
1 Powerman Dual 400W Power Supply w/Bridge
3 Ball Bearing Cooling Fans
1 CDROM
1 Floppy
2 3 1" to 2 HH convertors (for mounting additional HDs in 5.25" slots
4 5.25" HH slot fans
14 24" UDMA 2 Connector Braided round IDE cables
1 Floppy Cable
Assorted odds and ends

Linux (most distros should work)

with
Linux iSCSI services
SAMBA
MARS-NWE
NFS
NetAtalk


Just a bit under $5500

1.13GB of LVM doled-out Disk
120GB Systems Drive