What's Happening with Open Source HA Software?

Monkius asks: "A year ago, there seemed to be two promising Linux HA frameworks--along with lots and lots of experimental things: SGI's FailSafe, and Kimberlite from Mission Critical Linux. The FailSafe software website now seems very out of date, although the mailing list remains active, and there seems to be forward momentum. On the other hand, Redhat seems to have forked the development of Kimberlite, calling the fork Redhat Cluster Manager. They don't seem to be making development source available, at least to the public. Are these two projects still relevant? What's the current status of Open Source HA?"