Again, bad host name, but, this one has other problems. The GNU sites do not contain the file tar-1.13.25.tar.gz as the ebuild is looking for. They contain tar-1.13.tar.gz only. I modified the line to try to grab that file instead and emerge told me it had no idea what to do with that file. I was able to find a copy at ftp://gnu.wwc.edu/pub/mirrors/ftp.gnu.org/tar/tar-1.13.tar.gz, but it still doesn't work. I am stuck. This is all still trying to get emerge -u system to work on a fresh install from the recent instructions and cd images.
made it check gentoo mirrors first