If you look closely in the upper left hand corner of Google Docs later in the day, you'll notice that we've removed the small grey word "beta" from our logo. We're dropped our "beta" label today along with the other Google Apps (Gmail, Google Calendar and Google Talk). You can read more about this change on the Official Google Blog.
Over the past year, we've launched hundreds of features and product improvements to Google Docs, many of which we've documented on this blog and our What's New page. We still have a long "to do" list of features and enhancements that we're actively working on. Look for these changes over the coming months and years.