http://today.reuters.com/news/articleinvesting.aspx?view=CN&storyID=2006-10-02T223719Z_01_N02385078_RTRIDST_0_TECH-GOOGLE-OFFICE.XML&rpc=66&type=qcna

A bit more in this AP story
http://www.nytimes.com/aponline/technology/AP-Google-Office.html

and here:
http://news.com.com/Google+takes+a+bigger+bite+of+Big+Apple/2100-1024_3-6121970.html

From the description and address given in the stories, this appears to be the building.
http://local.live.com/default.aspx?v=2&cp=qsq75v8tzsg3&style=o&lvl=2&scene=1660245

Interior Tour
http://news.com.com/2300-7345_3-6121908-1.htmll

The "interior tour" link doesn't work

This link works:
http://www.eweek.com/slideshow/0,1206,l=&s=&a=190145,00.asp