Google has rolled out browser add-on that allows user to block the Google Analytics service to from tracking them, whenever they visit a website using Google Ananlytics.

Google Analytics Blocking Browser Add-On
Google Analytics is one of the most popular web analytics solution that provides webmasters with rich set of tools to monitor and track website traffic and marketing strategies. With all the uproar over privacy issues floating all over Internet, Google has went one step further and provided this browser to enable users to protect their privacy.
Quoting from the official Google Analytics Blog:
Even though Google Analytics doesn’t reveal personal information, we believe in giving users more choice and control whenever possible. So today we’re excited to launch the beta version of our new opt-out for Google Analytics. Now, you can download and install an add-on for your desktop browser that will stop data from being sent from your computer when you visit websites that use Google Analytics Javascript to track usage. This means the information from your visit will not be sent to Google Analytics or included in its reports.
The Google Analytics Opt-out browser add-on (beta) is currently available for Internet Explorer (7 and 8), Google Chrome (4.x and higher) and Mozilla Firefox (3.5 and higher). To install this Opt-out add-on in your compatible browser, click here.
[via Google Public Policy blog]