I just posted a quick summary of the new Profoto Pro-8a power packs over at my blog. Here's the basics:
2400 Ws pack recylce to full power in 0.9 secs.
10 f-stop power range in 1/10th increments (5 W/s - 2400 W/s)
Flash duration of 1/1,600 (full) - 1/12,000 (min)
Color temp varies less than 160 deg K from min to max
Shot-to-shot stability of less than 1/50th of an f-stop
Supports up to 1000W modeling bulbs
Built-in Profoto Air transceiver
This thing is more accurate than a D4 and faster than a Pro-7a.... with a price tag to match. The 2400 comes in at $11K and the 1200 at $9700.
Available in early October. I'm expecting to get hands-on time at Photokina.
Now taking pre-orders.