I’m a little late in reporting on this, but Adobe released BlazeDS RC1 on Feb. 1st.
For those of you who don’t know what BlazeDS is, it’s a soon-to-be open-source subset of Adobe’s expensive LiveCycle Enterprise Data Services Suite. It’s more or less an AMF (pdf) service gateway for your Java application, with other features like http polling for messaging. In the past, if you wanted the speed benefits of AMF with your large-scale java application you had to use a third-party solution like GraniteDS.
Sujit Reddy G has put together a good side-by-side comparison of the two.