The release (now called 1.1.0.RELEASE) will be announced imminently, once we get the documentation up on the SpringSource web site; the jars should be in maven central already.
It uses spring-retry-1.0.1.RELEASE, which fixes a problem with the exponential back-off policy when you use the retry interceptor.
In order to send the message to the DLE/DLQ, the MessageRecoverer must throw an AmqpRejectAndDontRequeueException. This signals the listener container to reject the message, with requeue set to false, causing the message to be sent to the Dead Letter Exchange.
Update your POMs, and give it a shot!
For users not using retry, where you want to immediately send to the DLE/DLQ if one attempt fails, you can simply set requeue-rejected to false (defaults to true) on the container.
Gary P. Russell
Spring Integration Team
SpringSource, a division of VMware