It is possible to upload packages for any Debian suite to
mentors.debian.net and the mentors site will accept them and list the
source packages into the appropriate Sources file for the suite.
Unfortunately the PTS has does not look at suites other than unstable so
if someone uploads a package to experimental or squeeze-backports then
the mentors to-do item will not be shown in the PTS. I have attached a
partial patch for this, but I need help with the XSL parts.