We are pleased to announce that Spring Integration 2.2.1.RELEASE is now available. A list of changes can be found here.
In addition, the 2.1.5.RELEASE is now available, with the list of changes here. However, 2.1.x users are encouraged to move to the 2.2.1 release - the 2.2. GA announcement is here.
The artifacts are available in the SpringSource Repository as well as Maven Central, or you can download the zip here.