A clip from the 'Goblet of Fire' trailer was shown on GMTV. A video of it can now be seen online.

While much of the footage is 'old' there is a new Dumbledore voiceover which is pretty awesome. Also the background/soundtrack music is much clearer.

The video can be downloaded from this page.

UPDATE: WB have confirmed that this the 'international teaser trailer'. It is NOT the full theatrical trailer which is generally two minutes long and has yet to be released. This international clip will not be made available in any official capacity.

UPDATE #2: A MUCH HIGHER QUALITY version of this clip can be downloaded from this page.

Source: Veritaserum