These ebuilds come from http://git.overlays.gentoo.org/gitweb/?p=user/tbc.git;a=summary.
If you have some problems, go to the official site first.
sigil : Sigil is a multi-platform WYSIWYG ebook editor for ePub format. ( http://code.google.com/p/sigil/ )
Add an ebuild in portage :
The ebuild is now in the portage tree.
You can also use layman : emerge layman then layman -a tbc
For Paludis use this rsync : rsync://gentoo.zugaina.org/tbc-portage
If you have a problem : ycarus(-at-)zugaina.org