From the blog post:
With the help of Nokia Suite, you'll be able to update your Symbian^3 or Symbian Anna phone (Nokia N8, Nokia E7, Nokia E6, Nokia X7, Nokia C6-01, Nokia C7, and Nokia Oro) to the Nokia Belle software when it becomes available.
You can now keep your information in sync between your phone, Mozilla Firefox 8, and Mozilla Thunderbird 8. In the Home view of Nokia Suite, there's an ever-growing collection of Nokia Store apps, games, themes, and entertainment at your fingertips. In Nokia Suite 3.3 it's also easier to find the messages you're looking for, since the messages you have sent and received are now organised in groups of their own.
Also improved, for Nokia's benefit, is that screenshots of problems can be attached directly to the 'Send feedback' mechanism built into the Suite.
If you run into a problem with Nokia Suite, please read the instructions for reporting the problem. Note that before you start testing the Beta version, you should choose to Start collecting logs in the Options for Nokia Suite. The collection of logs has also been worked on, and Nokia Suite now collects the most relevant logs to give us a better picture on what goes on "under the hood" of the program.