'Spy Kids 4' is in production?

I'm used to the secretiveness of the Robert Rodriguez camp (I even had to sign one of those ubiquitous confidentiality agreements when my nephew was an extra in the first Spy Kids), but it's always surprising how quiet the ramp up of production of a new film is. Here's a little hint from The Hollywood Reporter that the production of Spy Kids 4 is under way for the Weinstein Company with a release date set for August 2011. (IMDB.com lists the complete title as Spy Kids 4: Armageddon.) I know that casting has been active. Anyone know anything else?

Here's what Rodriguez told me in May:

Rodriguez said the “Spy Kids” reboot is for the Weinstein Co. and will include new child secret agents with actors — whom he did not identify — already in line to play the roles.

“I thought it could be good to reboot my own series,” he said. “That's my most loyal audience — not the film geeks, but the kids.”

The film's script already has been turned in.

“The Spy Kids Division has been closed down seven years ago,” Rodriguez said. “We will see some of the characters from the previous films.”