I'm in Tech support (as a bugzilla group ID) and I can see/enter defects using the standard "new bug" interface. But the new Bug-wizard does not present me with Red Hat Linux Beta as one of the product choices.
This is because the new bug-wizard page is not doing any kind of authentification checking when presenting the list of possible product choices. That is why there is currently only Red Hat Linux and Red Hat Public Beta listed which are both public. I will eventually figure out a way to do all products using this page without making the page extremely slow. It will probably have to be after the release cycle is over for it to happen. Until then all private products will have to be accessed through the old bug form.