The Natural Resource Ecology Laboratory at Colorado State University centers on multi-disciplinary research in ecosystem science to improve our understanding of the complex interactions between humans, management activities, and ecosystems.

This entry courtesy of Ty! Boyack

We are using heartbeat at NREL, in both academic and research areas. Currently our uses include fully transparent firewalls (used in conjuction with mac spoofing and proxy arp), web servers (apache), and soon mysql servers. We have also been testing the system as a disk server, and expect that our next deployment of disk servers will be built on heartbeat-based failover clusters. This is a great product - I'd love to see it expand to N+1 cluster environments.