I just solved it. The Ethernet Converter is set to Channel 3. I started changing the channels in the SMC, and I finally got ping. Sadly, nowhere in Orinoco's docs or the web was this information readily attainable. I still can't find mention of it. Hopefully this post will help someone in the future. Thanks to everyone that replied here!
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-Rob Riccardelli
80GB 16MB MK2 090000736