Pocket Wizard has just announced the new Flex TT5, the successor to the MultiMax. While it's currently only available for Canon, a Nikon version will be available soon. You can read about it here
So why would a flash trigger be Nikon or Canon specific you ask? That's because it reads and uses the camera's TTL codes and each manufacturer uses slightly different pins on the hotshoe to transmit those codes. It also does something else that is way more important for me, it allows you to pretrigger the flash. They call this HyperSync, and this is their brief description of what it does
"With PocketWizard HyperSync™ Technology, the FlexTT5 can precisely advance the timing of your flash trigger so that increased flash sync speeds, up to 1/500th of a second is achievable with many strobes."
Now while they say 1/500th of a second sync speeds are possible, the reality of it should be far greater. I can currently sync at 1/1000 or even 1/2000 using the now old fashioned MultiMax's with just about any camera. Here are a couple of examples shot with my full frame D700.
You may notice that the image shot at 1/2000 only has light on the bike rider and not on the rest of the frame vs the image shot at 1/1000 that has light across almost the entire frame. This is not really a technical issue, I just used a couple of other flashes on the 1/1000 shot to light up the jump. It's a bit more work to figure out but not technically more difficult. Both images used SB800's to light the rider, and for the image shot at 1/1000 I used a couple of Quantum T2D's to light the jump.
I'll try to have a post up in the next day or so with details on how to sync at 1/500th and higher.