There is an antenna there. That chip is obviously an ARM device, but danged if I can find any data on it anywhere.
Just like the new 13" MBP, there's 512M of RAM hanging out near the GigE controller. Still no idea what it's for, and a GigE controller certainly doesn't need half a gigabyte of RAM.
Once they have, you'll be able to view a graph of their reputation gained over time.
Here's a preview of what the graph will look like:
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