It date back at least to 2005-2006 if you look at their press release: http://gwei.org/pages/press/press.html http://gwei.org/pages/press/press.html The letter

It date back at least to 2005-2006 if you look at their press release: http://gwei.org/pages/press/press.html http://gwei.org/pages/press/press.html The letter from google is also dated 2006: http://gwei.org/pages/google/legalletter1.html http://gwei.org/pages/google/legalletter1.html