A new Harry Potter and the Goblet of Fire 30-second commercial is now online. While we have seen most of the footage before there are some new images of Hagrid, Ron, Harry and Dumbledore.
You can see some screencaps here.
Update: Windows Media and Real Player formats are now available and the lowest version of the download for each format has been added. Thanks to Yann of Univers Fantastiques for the tip!