Details of said policy can be found here: http://www.google.com/policies/privacy/
In addition to this, for people wanting to comment on the blog, you are more than welcome to do so! But please note, the blog does not allow anonymous commenting due to earlier issues with this (i.e. spam). Jabberjabber will try to respond to most genuine questions posted in the comments, depending on his real life time commitments. Which is to say, he's a busy chap and might not always be able to get back to you immediately!