For personal use, very little. You can buy an IBM low end server for $8k or so eg http://www-03.ibm.com/systems/power/hardware/s812l-s822l/specs.html http://www

For personal use, very little. You can buy an IBM low end server for $8k or so eg http://www-03.ibm.com/systems/power/hardware/s812l-s822l/specs.html http://www-03.ibm.com/systems/power/hardware/s812l-s822l/spe... There are some embedded machines, but not many now. Apple G5s are still serviceable and supported by modern Linux distros, and are almost free...