You should check out Daniel Robbins' website at funtoo.org. He (the founder of Gentoo) is providing up-to-date stage tarballs at http://www.funtoo.org/linux. Sure saved me a lot of time last time I had to install Gentoo.
i was already aware of this thing but it would be nice if this could be done by gentoo itself. or at lest via a symlink to these new tarballs.