The hard drive holding the root partition of my Gentoo server is about to be replaced. I could very easily copy it over while using a live CD (preserving permissions, of course), but that would be taking the easy way out.
Instead, I'm going to reinstall using a fresh stage3 tarball from Funtoo. If you haven't heard about it, its a fork (?) of the Gentoo project and is run by Daniel Robbins, the original creator of Gentoo. He uses a custom build script (dev-util/metro) to build a stage3 environment from the latest portage snapshot; the ones offered officially from Gentoo are updated every few decades it seems and do not take long to become outdated.
If you're going to do a new Gentoo install (and if you haven't, why not!?), I can't find a reason NOT to use a Funtoo stage3 tarball.