This is a (growing) list of Krakatoa-related resources on the Web:
StudioDaily Krakatoa Introductory Tutorials show the very basics of Krakatoa:
The Krakatoa Thread on CGTalk contains lots of pre-release information and an ongoing discussion of Krakatoa’s features:
http://forums.cgsociety.org/showthread.php?f=206&t=445722
JHJariwala’s FX page contains some tests created using Krakatoa:
http://www.jhjariwala.com/?/portfolio/fxanimations
Kai Wolter’s Krakatoa page contains experimental videos using Krakatoa Beta 13:
http://www.kai-wolter.com/research/krak
NextLimit RFLabs - RealFlow and Krakatoa
http://www2.nextlimit.com/rflabs/?p=18