You can’t get a neater and more functional companion to Google Docs than the gDocsBar extension for Firefox. Other than giving you a cool sidebar to work with your Google documents in – it also supports both search and filter from the sidebar interface.
With how well this blends right into the Google Docs interface, you would expect it was released by Google themselves. Also I could see this being a reason for some people to give Google Docs a second shot – due to the fact that it makes it even easier to view your documents you have stored there.
To get a preview of the interface before installing – you can check out their official site for the extension at gdocsbar.com.