Google Translate uses AI.
It uses currently translated text to predict translation of strings that you provide.
Re:Siri is the Next Big Thing
by yalimgerger on Friday October 14, 2011 @10:03AM
(#3111195)
True. Thank you for pointing that out. I missed it.
Google uses AI for the Priority Inbox functionality of Gmail. It also seems that AI & machine learning are used for displaying ads, see [1].
[1]:http://www.quora.com/Why-is-machine-learning-used-heavily-fo...
Didn't know about Google. They might be working on something but I don't know of any production use of their A.I. software.