Via JoBildo: You can download the Warhammer Online: Age of Reckoning open beta client starting from August 15. Maybe the "coming August 23" banner that got Massively so confused is the announcement of the open beta start? 4 weeks before release on September 18 would make sense.
No news yet on when the NDA will drop, but I'm warning you that my WAR coverage will NOT be extensive. WAR is one of the games that already has several very good blogs and fansites up and running, whose coverage will be way more detailed than mine. Plus Mythic wasn't exactly shy about letting us know many details of how their game is working. I'll post my opinions when the NDA drops, but will probably not write a complete "how it works" review, because that would be superfluous.