Right on the heels of the NMS 1.2.0 RC1 release comes the ActiveMQ-CPP 3.1.0 RC1 release.
Some of the highlights of this release are the addition of the Inactivity Monitor which allows detection of failed connections much quicker which makes the failover capabilities even more robust than in the 3.0 releases. The Threads code has been rewritten as well and is now much leaner and performs quite a bit better than previous versions. This version also support the Individual Ack mode that was introduced in ActiveMQ 5.2.
Grab a copy of the RC1 source archive from here and start testing it out today!