I'm assuming ESXi will act very similarly to VMware Workstation or other products, so answers based on knowledge of those programs might also help.
I want to plug in 30 USB Wireless or Ethernet adapters into my server, and let each VM access one and only one of these devices.
Unfortunately, I don't have the hardware to just try it out as the purchase of hubs and adapters hinges on the result of this question.
The answer could be a resounding "yes, easy!" and that would be great. I couldn't find any answers to this question with google, and it's possible that this is because it's so easy to do.