Google is adding some new customization to the Google bar that appears on the top of Google related pages when the users logged in.
Users can now add boxes for Google products they use, such as Google Maps, Gmail and Google Docs. When you view the available button category, pretty much every Google product available is represented, including products you may have forgotten about such as Orkut and Picasa.
This feature is similar to a Google toolbar feature that many users remember fondly, where users could add similar button on the toolbar for quick access to Google products. That toolbar is still available, but only for Internet Explorer. And unfortunately, this new Google bar that works cross browser does not have a PageRank display option as the old toolbar did.
The new Google bar is rolling out of the next couple of weeks, so if you don't have it yet, it should be available shortly.