Also, I'd note that the new, clean, thread in R&N has a good and legible version of the ACARS messages, and while I'd echo the statements made there that we don't know enough about the details (yet) I will note that not one message is ATA 24 - Electrical. Which seems to at least make the various electrical power failure scenarios less likely at this point. (Indeed, that thread has become almost TechLogish right now)