Is there any handy software utility available to do USB port sniffing on MAC OSx 10.6 and above ? We can do that in Windows with few software utils available as freeware and several licensed versions...
If you are registered as an Apple developer, you can download a version of the IOUSBFamily code with logging enabled; it comes with a "USB Prober" application. That might let you do some of what you want. I'm not sure Apple provides any code in the standard version of the USB code that lets you get that sort of information from the USB stack.