Figured part of it out. With MacOSX Mountain Lion, I had to use the WAN/LAN port, re-establish the ICS, make sure the Ethernet address on the Mac is 172.16.42.42. The ICS bridge creates the network address range of 192.168.2.0. I ran "netstat -r" and saw that 192.168.2.10 with a MAC address as the gateway was connected to the network interface of "bridge0."
Pointed the browser to 192.168.2.10:1471 and it works great now. Connected to the Pineapple Bar successfully.
Maybe things are different on Mountain Lion?
Well, I'm able to get out to the internet from the pineapple now, but passthrough isn't working any more. There's something goofy with the routing between the 172 and 192 interfaces. If I plug back into the POE/LAN port, and use the 172 web address I can re-connect and passthrough works. But no outside access.
Any ideas?