David blogged about this over on Strobist.com and I have to chime in a little about the sync speed issue.
Sync speeds aren't that important to me in the studio. I can sync at 1/60th or I can sync at 1/200th. It makes no difference to me.
But I was "brought up" with the knowledge that sync speeds are important because small strobes like the Nikon Speedlights don't have the power to overcome the sun... unless you "turn down" the power of the sun with faster shutter speeds. This is of course only possible when you sync your strobe to your camera. The faster the camera/strobe syncs, the faster the shutter speed you can use, and the darker you can make the sky.
My Nikon D3 syncs with Nikon Speedlights at 1/250th easily. With the AlienBees, I've only been able to consistently use 1/200th. With Winson's studio strobes in Taiwan, we were syncing 1/160th.
But not every camera is the same. Not all strobes are made equal. Apparently many users are reporting that their sync speeds are 1/160th and not the supposed 1/250th. Here's a great post about the Canon 5D Mark II that you guys should read: Know your sync