the Motorola press release is here. It doesn't say anything about 70 GHz
chips!
http://www.corporate-ir.net/ireye/ir_site.zhtml?ticker=MOT&script=410&layout
=-6&item_id=203874
basically I think they have managed to bond a gallium arsenide layer to a
silicon substrate in a way that allows both electronic and optical
processing. Getting optical processing to work on a chip is a big
achievement.
--
John Brownlow
http://www.pinkheadedbug.com