Fedora is the RedHat "testbed" and has regular updates similar to the debian/ubuntu universes.
One of the core features of CentOS/RedHat/Scientific Linux/etc is their longterm support and package freeze (excluding critical security updates). If you are reliant on a different version of software from the default repositories (both newer or older) then you are encouraged to build and package them yourself. Additionally in the RedHat-derivative universe there is the EPEL package repository which contains a wider range of software and is kept more readily updated in addition to being maintained by the Fedora Project (essentially RedHat).
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Fedora is the RedHat "testbed" and has regular updates similar to the debian/ubuntu universes.
One of the core features of CentOS/RedHat/Scientific Linux/etc is their longterm support and package freeze (excluding critical security updates). If you are reliant on a different version of software from the default repositories (both newer or older) then you are encouraged to build and package them yourself. Additionally in the RedHat-derivative universe there is the EPEL package repository which contains a wider range of software and is kept more readily updated in addition to being maintained by the Fedora Project (essentially RedHat).