Another interesting concern
http://blogoscoped.com/archive/2008–09-04-n10.html
quoted from article: The auto-suggest feature of Google%u2019s new Chrome browser does more than just help users get where they are going. It will also give Google a wealth of information on what people are doing on the Internet besides searching.
Provided that users leave Chrome%u2019s auto-suggest feature on and have Google as their default search provider, Google will have access to any keystrokes that are typed into the browser%u2019s Omnibox, even before a user hits enter.<BR>