The current mpm-peruser patch applied by the apache ebuild is 20_all_peruser_0.2.0.patch
There's a new upstream version available at http://www.telana.com/peruser.php
httpd-2.2.3-peruser-0.2.1.patch (Released 2/5/07)
Steps to Reproduce:
Setting the severity to (at least) normal since it fixed the massiv segfaults I experienced with recent apache versions using mpm-peruser:
# cat /var/log/apache2/error_log | grep -c "exit signal Segmentation fault (11)"
Since applying the patch yesterday not a single segfault appeared any more, while on a normal day there were hundreds.
Yeah, I imported a newer patch to the tarball, should be available to you as of now.