Sabayon Linux
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RR4 and RR64 Linux
This is a Gentoo based Linux distribution. Gentoo being a Linux project that can be automatically optimized and customized for just about any application or need. Extreme configurability, performance and a top-notch user and developer community are all hallmarks of the Gentoo experience" (from Gentoo GNU/Linux website).
So, what's the difference between RR4/RR64 Linux and Gentoo GNU/Linux?
While Gentoo comes in source and has to be compiled for your specific computer environment, RR4 (and RR64) come in the form of an installable livedvd.
RR4 is the 386 based livedvd RR64 is the AMD64 based livecd
the RR4/RR64 homepage is [1]