Most things in Splunk nowadays seem to be good at scaling outwards - multiple indexers, pooled search heads, etc.
One piece I haven't seen any HA option for is for the License Server/Master.
Right now my disaster-recovery plan in the event of losing the license server is to configure one of the other Splunk nodes as a License Master, and to flip the DNS alias they're all configured with to point to the new box.
However, that's still pretty barebones compared to the automatic nature of Splunk's other components.
Is there an HA option for the license server that I'm not aware of?