Nope. I am recently starting to upgrade ESX hosts to vSphere / ESXi 4.0 so I will test 4.0 soon to see if there is better FreeBSD support. For firewall I started using Endian Firewall on a VM instead fo m0n0 since it is based on Linux and works a little better. But I would really prefer m0n0wall as it is a much smaller footprint and generally easier and more intuitive to work with