I ran pkg-clean (from gentoolkit) because there were a lot of duplicate packages (differing in version). I selected to deinstall an older spython version. After that, emerge and ebuild weren't working anymore. It seemed that all files of spython were removed instead of only the older ones. I resolved the problem by downloading a binary package of the gentoo ftp site, unpacking it and copying it's contents to the appropriate place. Now emerge was working again.
Unless you are able to provide me with a log of your misfortune, I will not be able to figure out just what went wrong. I cannot reproduce your problem here.
This is probably not a pkg-clean bug but a spython bug. Check this thread: http://lists.gentoo.org/pipermail/gentoo-dev/2002-March/010292.html