Asterisk 10 was released on October 27. http://www.crn.com/news/networking/231901758/digium-confirms-asterisk-10-release-media-engine-gets-makeover.htm Reproducible: Always
I disagree, beta 2 of the 10 (or 1.10, depending on how you number) series was released that day: http://www.asterisk.org/node/51680 This is not ready for public consumption yet, please stick with 1.8 for now.
+*asterisk-10.0.0_rc2 (16 Nov 2011) + + 16 Nov 2011; Tony Vroon <chainsaw@gentoo.org> +asterisk-10.0.0_rc2.ebuild: + Release candidate for the long-term-support 10 branch; this will follow the + 1.8 series up soon. Digium reports new T38 features, but you already had + backports of these in 1.8 ebuilds. ConfBridge has been greatly improved.