I did an emerge -e world, and it blocked on app-misc/dnetc-2.9008.490, waiting for me to supply interactive configuration input. (It wanted me to enter my email address, as if I'd typed "dnetc -config") This cost me a few hours of compiling time. Of course, Gentoo ebuilds are not supposed to do that. A long emerge should be able to run to error or completion unattended. My email address was already in /etc/conf.d/dnetc, anyway. I think the pkg_preinst step that calls "/opt/distributed.net/dnetc -quiet -flush" is the problem. dnetc is being too "smart" and implicitly doing -config even though that option wasn't given. Maybe this step should be removed, and a comment asking the user to do it himself added?
I've made some modifications so it uses the same configuration as the initscript. Please test the new 2.9009.494 version.