Scripts have been written that largely automate the installation procedure for the Debian release of Linux, which will come with the so-called "potato" release. Hopefully our own Lamar Owen will do something similar for a future RedHat release.
This doesn't quite answer your question as it still leaves one the chore of installing OpenACS, rather than buying a box all ready to go. But it will greatly simplify the process, particularly compared to the hair-pulling needed simply to install Oracle for ACS Classic...
