I have to say that Gentoo unplugged lots of servers since of a CGI attack.
the Portage website and the wiki are offline for example.
No dangers for people who run Gentoo though.
nothing in the Portage Tree has been changed and you can just install gentoo.
but just half the Docs are offline.

For more info: Gentoo Forums :: View topic - gentoo-wiki.com down?!?