Small Linux Mosix cluster system

We recently installed a small Linux cluster. There are two versions of Mosix: a kernel patch (K-MOSIX) that can be applied to a specific Linux kernel, and a user-level package (U-MOSIX) that can be used with different Unix platforms.
We installed K-MOSIX, because we're running Linux and there's no need to reconfigure the user-space programs. But if we find time we'll install U-MOSIX too and test which (dis)advantages each concept has.

We built just a temporary cluster with nodes that boot from CD. This allows us to dynamically add/remove nodes. We just have to connect a new computer to the LAN and boot from CD-ROM.

The master computer we used to manage the whole cluster was a laptop (1GHz CPU, 256MiB RAM) running Debian GNU/Linux.
As node we used a 1,4GHz Athlon, 512MiB RAM for the first test. The second test performed at school, 10 nodes (933MHz, 256MiB RAM) participated the cluster.