Now you feel the need to document the steps don't you.
I did the following.
1. Create a simple web page available on port 1234
2. Modified vmnet8\nat.conf adding this port entry
[incomingtcp]
1234 = 192.168.33.141:1234
(the machine IP address being 192.168.33.141)
3. Turned on Web Sharing
4. Attempted to access the VM web page using the URL localhost:1234
This does not work for me.