http://www.engineering.columbia.edu/new-technology-may-double-radio-frequency-data-capacity-0

(also being discussed on slashdot)

I think there was some other full duplex technology developed at stanford discussed about 6 months back?

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Dave Täht
Let's make wifi fast, less jittery and reliable again!

https://plus.google.com/u/0/107942175615993706558/posts/TVX3o84jjmb