Ok, so even better of a solution is this:
Openvpn can operate in two modes with respect to DHCP and tap. <http://openvpn.net/index.php/open-source/documentation/manuals/427-openvpn-22.html> "If --server-bridge is used without any parameters, it will enable a DHCP-proxy mode, where connecting OpenVPN clients will receive an IP address for their TAP adapter from the DHCP server running on the OpenVPN server-side LAN."
This is the mode that is affected by Fusion. The solution is to have the openvpn server provide IP addresses itself (via using server-bridge *with* parameters) as opposed to operating in DHCP-proxy mode. Also note that this mod doesn't require the tap-up-down.sh script mentioned in a prior post, so it seems like a double win to me.
This mode is not affected by Fusion.