I've written a guidexml book on Gentoo network configuration which covers a basic setup and more advanced stuff such as vlans, tunnels, bridging, etc. All of these are supported by baselayout-1.11.x and online documentation is sorely lacking.
Created attachment 55491 [details] index
Created attachment 55492 [details] Getting started
Created attachment 55493 [details] advanced configuration
Created attachment 55494 [details] modular networking
Created attachment 55495 [details] wireless
Created attachment 55496 [details] adding functionality
Created attachment 55497 [details] Management
I've added the documentation in draft/ (http://www.gentoo.org/doc/en/handbook/draft/netbook.xml). I'll integrate it in the Gentoo Handbook when baselayout 1.11 hits stable.
Created attachment 60726 [details, diff] updates documentation to version 1, ready for stable release swift, you may need to review the uri's link to valid pages.
Committed in draft.
All in CVS. Thanks for the wonderful addition !