Issued this morning by Glen Barber was a 10.0-RELEASE status update. Long story short, a 10.0-BETA 4 release is happening and its builds will be started tomorrow and there's still some outstanding issues being addressed by the FreeBSD developers. After the beta four release there are still three planned release candidates prior to doing the official "RELEASE" builds.
The process of going from RC1 building to doing the official release will take one month at a minimum, but now with only starting on doing the BETA4 release, it makes a 2013 release next to impossible for FreeBSD 10.0. FreeBSD 10 had been running behind schedule for weeks already and thus ruled out any November release but now it's clear no official December release will happen. In reality the stable release will probably happen sometime in January or February. The out-of-date release schedule can be found on FreeBSD.org.
On the bright side, at least FreeBSD 10.0 will be a quality release rather than rushing it out the door. FreeBSD 10.0 will present many great features so at least the release should be worth the wait. In the mean time we'll entertain ourselves running benchmarks and evaluating the new DragonFlyBSD 3.6 release.