1. Configuration inheritance: I would go further and allow the definition of "configurations" that cannot be started, only inherited from.
2. Replication queue: I discussed an upgrade to the replication queue with Will, similar to JGroups' TransferQueuBundler [1]. It does raise an interesting point about why we need the same functionality both in JGroups and in Infinispan, though...
3. I think ClusterLoader is still useful in invalidation mode, and also replication mode w/out state transfer ("lazy" state transfer).
Cheers
Dan