In section 3, there are some dead links which're related to Todd Sunderlin, who has already retired referring to the Gentoo Linux Former Developer List. http://www.gentoo.org/proj/en/devrel/roll-call/userinfo.xml?statusFilter=Retired Maybe, these links are need to be fixed.
Fixed in CVS, thanks for reporting. If there is any current Sparc information resources similar to the one todd used to keep, please feel free to open a new bug with the proposed addition to the FAQ.