To reiterate the issue, clicking Settings, and trying to goto Wifi, it was just grey'd out, and you couldn't activate it. Pressing the icon did nothing.
Took it to the Genious Bar at the apple store, and the tech said that most likely the WLAN card had come unsoldered to the board. he said he had only seen this one other time in this particular store.
End result, they gave me a new iPhone. Took it home, hopped on my Wifi no problems, everything re-synced, zero downtime pretty much.
/applaud apple service
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