Cluster Update: I´ve gone ahead and started building my Linux cluster to act as my way-over-the-top web server. I grabbed 6 identicle Athlon based systems that I wasn´t using and ripped out the hard disks (I only need the drive in the master node). These were then all networked and I then went searching for tutorials on how to set it all up.
After a bit of searching I found this tutorial which is quite good. I used Fedora Core 3 since I already had the disks on my desk but it works the same. The only bit that I found confusing was adding the libraries lines which after more searching is added to the file /etc/ld.so.conf. I´ve booted it all up with the master and one slave node and I´m about to do a boot with all 5 slaves. After that I might do some testing to see what kind of performance I´m getting out of it.