Multi-master and multi-volume will take more time, but I think I will be able to get master-to-multiple-slave operation on H2 working soon and that will be roughly as efficient as mirror-stream is for H1. There's still a ton of work that needs to be done on H2, but single-storage support is rock solid and H2's compression features are really nice. H2 also has working snapshot support, but it isn't automatic like it is on H1. H2 snapshots are writable though, while H1 snapshots are read-only.
-Matt
