IDK where you read that about 1 month, but under the "testing phase" section, it simply states that Motorola will provide the approximate month tha the OTA will be available. In other words, they will tell us when it will be available, which has already been done. Also, that page says updated on 5-18-12, so this could be very well past the "development" phase.
I have no idea where they are at with this and I'm of the mindset that "I'll get it when I get it." Just sayin'.
EDIT: FWIW, it also says the XOOM is in Testing Phase and the OTA is out for it.