I've just submitted my entry to this competition. You could submit a video, slideshow, or essay, or some combination of all three. I decided to submit a slideshow and an essay. I was going to submit a video, but I didn't think I'd have time to edit it and produce the sort of perfect script I'd prefer.
Click the pic to the left to see my entry. If you're eligible to register for Publish 2.0, which is free, then do so and please vote for me! If you're an independent journalist, you should be eligible. And "journalist" may include being a blogger.
But even if you are not eligible, I'd be interested in your opinion of my submission.