Building a low power home server for less than $80....

So my friend Walt was looking for a way to store his media on his network.  He had been running a freeNAS box for years but really wanted to turn off the loud power hunger 10 year old machine in the corner.  So he started researching and first converted a $30 PogoPlug to ArchLinux.  This worked but while surfing he found out that a GoFlex could also be converted to run ArchLinux.  As he discusses this gives him two advantages.  The first is internal 1GB SATA disk is going to be faster than any USB drive.  The second is by having an internal disk he can assign a real swap space.  It also will let things comiple faster in Arch.  Check out his articles and let us know what you would do with the server.