Comment USB analyzers (Score 1) 31
The Ellisys Tracker 110 (http://www.ellisys.com/) is usually regarded as the least expensive yet functional hardware USB analyzer. It's about $900. I have one and it seems to work well. It feels overpriced but, when you need it, you need it. Lots of other resources at http://www.usb.org. One of the Ellisys developers hangs out there as well.
