I'll let Ryan chime in if he wants to address the details/specifics of the pack, but I will say that this will be a BPL specific model. ULA will not likely offer this pack as a standard in my line-up. As such, please direct comments and questions to the good Dr. :)
Ryan and I have discussed the pack a bit since the Arctic 1000 and have addressed concerns that came up with the original during the hike. Obviously after being on the back's of the likes of Roman, Jason, and Ryan there has been great feedback!
The real biggie for me and my satistfaction with the pack is simply that I've had more than a few weeks (like the original) to brainstorm, design, and sew the version that will be available...not being pressed with an actual timeline has naturally resulted in a much better end result.
Anyway, I still have the list of names, etc from last year. I'll likely forward that to Ryan at some point or send a mass e-mail as to the availability, etc.
In regard to order priority, etc I am hopeful that the initial run of packs will take care of everyone that has been so patient and had an interest in the design. Obviously that is BPL's call on how to handle that.
To be frank I am not really sure when the stars will re-align for ULA to have the time to do this again, so if interested, I'd encourage you to make yourself known.