Marcia - 11:15 am on Aug 22, 2005 (gmt 0)
Here's a portion of what the article in the Chicago Sun Times [suntimes.com] says about it:
Some features, including personalized news, involve sending details of its users surfing habits back to Google. Google said no personally identifying data is transmitted, and users can opt out.
The Beta of Release 2 is being released today, but I wonder what the default setting for that will be.