Hi Mario:
Thanks for keeping up with this. I'm very disappointed at how VMWare has handled this issue, as it's not trivial. It's almost as if they are looking for reasons not to fix this. Regarding your earlier post about them saying that the BIOS interrupt remapping is at fault on your machine, I'd suggest asking them to try it on one of their own lab machines if they think the problem is with your computer BIOS rather than ESXi. As far as I know no USB controller on any machine whatsoever can be setup as a pass through device under 5.1; which if you believe their explanation that it's a BIOS problem implies that every BIOS out there has a problem. That explanation just doesn't hold water. I'd also suggest giving them a link to this thread if you haven't done that already, so that they understand that this problem isn't some sort of isolated issue that only affects a few computers with some sort of odd configuration.
Unfortunately I only have the essentials package so I'd have to pay a couple hundred dollars for the "opportunity" to tell them that they have a bug. It sounds like our problem here is convincing them that they actually have a bug.