I have uploaded the 3 hour hacking session video about Oracle instance state objects and how to read Oracle systemstate dumps to my YouTube channel:
Note that as I just uploaded the video, you may want to wait for a few hours until YouTube publishes HD version (currently it's available only at 360p, but that should change soon).
The slides are in Slideshare:
I will run another hacking session in the end of January too (somewhat higher level, going through some troubleshooting scenarios with ASH and V$ views). Stay tuned!