SlugFarm is a cluster of NSLU2s? that are connected together via Ethernet and controlled from a Mother Slug. Only the Mother Slug has a HD and the others are diskless except for CF Keys for swap space.
rwhitby: CF Keys for swap - they'll wear out pretty quickly ...
The Mother Slug has 2 ethernet ports (one via USB->Ethernet)
The software is distcc which allows the Slave Slugs to participate in builds (since the Slug is not a speed demon)
It is best if they run NFS root from the Mother Slug.