I just saw the announcement on the JBoss Matrix blog: Congratulations. However, I do remember seeing an implementation of the Partitioned Cache being planned for January when I checked recently. It now looks like it's planned for May.
Right now, I use memcached, but I'd far prefer to be using JBossCache. Partitioning is, IMHO, they key feature.
Thanks and keep up the great work.
Yes, we moved partitioning into the 1.4 release.
However, Buddy Replication is planned for 1.3