It started with this video, Dave Black's YouTube video of shooting motor cross with a bank of Nikon Speedlight's. The sight of 8 lights toghether is pretty impressive, let alone the images you can create with it. Lightware Direcet makes an aluminum bracket that holds four flashes in a square pattern, hence the name FourSquare. Bolt two of those together and you have an eight square. And finally add the center mount for a ninesquare.
So I had to make my own, and one-up it by adding a ninth speedlight in the center. This happened to coincide with the release of the new TTL Pocket Wizard's. These Pocket Wizard's are radios that allow you to fire flashes remotely, up to to several hundred feet. I've had PW's before that allow you to fire the flashes, but these new units allow for control over the power of the flashes. In addition they also allow high speed sync, which is a great feature when shooting action. Normally flashes max sync speed is 1/250 or 1/200 of a second, these will go much higher. Great for stopping the action.
Up until the Pocket Wizards were delivered I'd been firing the flashes with a 30' TTL cable. While it does work and is inexpensive, it's very limiting. I wish I could say I never pulled over the stand with the cable, but I can't. This new remote system will be much better.
The system definitely looks a little crazy but it's amazing how much light you can get out of AA battery flash units.

5- SB900's
2- SB800's
2 -SB700's
Mounted with two of Lightware Direct's foursquare blocks.

Nikon's commander unit SU-800 behind nine flashes. I was hoping this unit attached to a Pocket Wizard would control the flashes, sadly it does not. Back to the drawing table, either buy 9 pocket wizards or build a giant daisy chain TTL cable. I'll be trying the latter soon.