You need a debug version of IOUSBFamily.kext for the USB Prober, that output log information. More about that here:
http://developer.apple.com/hardwaredrivers/download/usbdebug.html
On that page you also find a link to a Q&A about USB development on machintosh, with information regarding 3rd party USB analyzers, both hardware and software.
There are 4 companies mentioned in the Q&A.