CS6 launch day (live at 10 AM PST).
The cost of ownership of Production Premium is about the same at $1899/$375 upgrade, and the Cloud service master collection is $50/30 per month by year ($600/$360), or a la carte per app ($20/month for AE); see pricing and a summary of details at ProDesignTools.
The ship date for CS6 will be announced later. In the meantime, there are some additional video demos from Adobe collected in More forays into Production Premium CS6 at PVC.
By the way, there are good number of intro tutorials by Adobe on on Speedgrade CS6, and now also a proper series for Prelude, Prelude CS6 Workshop by Maxim Jago and Video2brain.
Update: check out the glass render made with the CS6 ray-tracer by Giovanni Antico.