The SELinux userspace project has released version 2.4 in february this year, after release candidates have been tested for half a year. After its release, we at the Gentoo Hardened project have been working hard to integrate it within Gentoo. This effort has been made a bit more difficult due to the migration of the policy store from one location to another while at the same time switching to HLL- and CIL based builds.
Lately, 2.4 itself has been pretty stable, and we're focusing on the proper migration from 2.3 to 2.4. The SELinux policy has been adjusted to allow the migrations to work, and a few final fixes are being tested so that we can safely transition our stable users from 2.3 to 2.4. Hopefully we'll be able to stabilize the userspace this month or beginning of next month.