howto coordinate with RHEL packages/pakagers?

Hello, Maybe there is something obvious I didn't figured out, but I don't know where to look for some information about RHEL packages: * is there somewhere a list of packages in RHEL? And versions/maintainer information? * where are the spec file available? Do we have to expand srpms or is there something convenient similar with the fedora cvs? I can't even find the srpms. I can see a communication channel, bugzilla, but it is not necessarily the most convenient, it can be a bit heavy sometime. -- Pat