We'll have an Open HA Cluster demo running the whole week. Come visit us in the Sun Pavillion to see Open HA Cluster running on OpenSolaris.
I'll also be giving a talk, "High Availability with OpenSolaris", as part of the Deploying OpenSolaris in your DataCenter deep dive track on Tuesday, June 2. Contrary to the "official" CommunityOne information you might find elsewhere, this deep dive track is completely free. Just register with the "OSDDT" registration code. The other talks in this track, on ZFS and Zones, should be quite interesting as well.
Tech lead, Open HA Cluster 2009.06