At least it is time for next RC.
Except that calling it that would be lieing. RC means Release Candidate, which means that in the devs honest opinion "this exact release" might become the v1.0 without any further changes. Its been very well stated that the devs have further plans and redesign issues they want to accomplish before they are comfortable calling a given revision 1.0. So lets allow them to work at their pace and call something a v1.0 (or an RC for it) when they are ready and comfortable doing so.
Now on the other hand if r4500 just happens to be a really stable revision, it might be worth having someone go ahead and make a package. But please dont call it RC3 unless it really -is- an RC.