Wireless like the 602 triggers flash in the pan sells seem very good, I borrowed a set the other day before buying my own, they work as a flash trigger, work as a wireless shutter release and can also syncronise 2 cameras using the remote on a hotshoe and the receiver connected to the remote shutter release on a 2nd camera meaning that pressing the shutter on 1 camera releases the sutter on a 2nd camera. quite a cool feature I thought and convinced me that I will buy a set of them.
Wireless just makes things a whole lot more flexiable, I have a OC3 cord and its great but just limits the distance the flash can be from the camera and there is the risk of pulling the flash stand over.