There are a number of distributions which currently use Anaconda. This is a list of the ones which we are aware of.
Red Hat Enterprise Linux
Progeny Componentized Linux, based on Debian (defunct)
Vida linux, Gentoo variant using Anaconda
Foresight Linux, originally derived from rpath Linux
Sabayon Linux Installer
There are likely many more distributions using Anaconda. Feel free to contact the authors to add to this list.