Although he refers to the Urchin upgrade as Version 6.0, Crosby said that Google will not call it officially by that name, as the company prefers to distance itself from number-type upgrades.

Urchin was founded in 1995 and, when it was acquired by Google, claimed having over 20 percent of Fortune 500 companies as clients.

On Tuesday, Google will also announce new features for the Google Analytics hosted service.

One called Site Search automates and improves the product's ability to capture data and generate reports on a Web site's search engine activity.

Crosby calls this "goldmine analysis," because it tells webmasters what keywords and terms visitors enter on their sites' search engines and how successful, or not, they are at finding what they're looking for.

Another enhancement is event tracking, designed to track and measure what visitors do with increasingly popular interactive page elements, like Ajax and Javascript user interface components, gadget mini-applications and Flash movies.

Google expects to turn on these two new features for every Analytics user in the coming week.