Not sure whether I understand you or your questions.
The Fedora Project is not as ready yet as would be necessary to make community commitment possible in many areas where that is planned. You might want to read the updated roadmap at:
http://fedora.redhat.com/participate/
It would be very unlikely to meet any QA people who are not Red Hat employees, because the Fedora Core development and QA process has not been opened to such a level, and official Fedora Extras and Fedora Alternatives do not exist yet either.
In the field of Fedora Extras package development and QA, community contributions are possible at
http://fedora.us which is the community project that will be merging into the Fedora Project and at
http://rpm.livna.org which hosts packages with legal concerns, such as patenting and licensing issues (mp3, video players e.g.).
Apart from that, the usual ways of trying to contribute apply. E.g. testing prerelease updates or even Raw Hide, submitting bug reports and patches (
http://bugzilla.redhat.com http://bugzilla.fedora.us http://bugzilla.livna.org ), helping on mailing-lists. Not everything is documented, but it's always recommended to seek contact on the official mailing-lists if there's any area where you'd like to help.
Fedora Legacy shouldn't be any secret, because it is mentioned at
http://fedora.redhat.com/participate/terminology.html and if you search the place where community commitment is possible right now, you can find
http://www.fedora.us/wiki/FedoraLegacy