I'd really like to see PyPy in Portage.
Sorry for lack of info. URL is http://codespeak.net/pypy/ and it would be a very simple installation: untarring the tarball. A good USE flag would be build, which would compile PyPy into a standalone executable.
Seems that also is the replacement of psyco, and may work on amd64 :-O
No progress here for 1 year, closing WONTFIX. Feel free to reopen with an ebuild.