I second that USB pass-through. We have a virtual license server running with two USB dongles on it. The reason we think it's ideal to run a license server virtually is due to the MAC address that's usually required to register your machine with various software vendors to provide you with a key. This way, if the hardware the server is running on fails, you don't have to put the same NIC in another box (that is if the one you registered wasn't the on-board NIC!). That being said it's obviously also important to be able to set static MAC addresses in a VM. Unfortunately VMware only allows a certain range. Other than that I think it looks like a very sweet step forward, but I know for sure we won't switch unless we can move all of our servers ... including our license server and few linux servers for sure.