Exherbo is a distribution designed for people who know what they're doing with Linux. It is inspired in many places by Gentoo -- in particular, it supports flexible source-based installation with up-front configuration.
Exherbo is not a Gentoo fork in the conventional sense. Although it shares some code with Gentoo, and although many concepts are similar, and although many of the people involved were or are Gentoo developers, most Exherbo code is rewritten from scratch.
Exherbo is not, at the moment, a user-targeted distribution. It supports packages that the people involved find interesting or useful; it probably does not support your favourite desktop environment or applications. That kind of thing will come later -- there are plenty of other options for users who want a distribution that attempts to meet everybody's needs rather than just those of its developers.
http://www.linuxlinks.com/portal/news/article.php?story=20080520142535685