FWIW VMWare Fusion Version 3.1.3 (416484)
$ lsb_release -ds Ubuntu 10.04.2 LTS
$ sudo sg_vpd --page=0x80 /dev/sda Unit serial number VPD page: fetching VPD page failed
$ lsmod | grep vm vmblock 12995 1 vmmemctl 8572 0 vmci 31256 1 vsock vmxnet 18624 0
FWIW VMWare Fusion Version 3.1.3 (416484)
$ lsb_release -ds
Ubuntu 10.04.2 LTS
$ sudo sg_vpd --page=0x80 /dev/sda
Unit serial number VPD page:
fetching VPD page failed
$ lsmod | grep vm
vmblock 12995 1
vmmemctl 8572 0
vmci 31256 1 vsock
vmxnet 18624 0