xbmc-9999 fails to apply the xbmc-9999-nomythtv.patch. I believe this is caused by commit 2d79579adf which allows compiling without mysql which the nomythtv patch also does.
should be all set now in the tree; thanks for the report! Commit message: Update mythtv patch to latest git http://sources.gentoo.org/media-tv/xbmc/files/xbmc-11.0-nomythtv.patch?rev=1.1 http://sources.gentoo.org/media-tv/xbmc/files/xbmc-9999-nomythtv.patch?r1=1.4&r2=1.5 http://sources.gentoo.org/media-tv/xbmc/xbmc-11.0.ebuild?r1=1.12&r2=1.13