For me, the vertical scrollbar in my browser is a visual cue that I have the ability to scroll using the scroll-wheel.<p>If the news page hadn't explained that using the scroll-wheel will scroll the page horizontally, I wouldn't have known to try it.
Horizontal scrolling is annoying, and it's becoming sort of a trend... I've seen this in a few sites in the past few weeks, including the redesigned MySpace.<p>It's confusing and it doesn't add anything to understanding or experience. One of those things that you <i>can</i> do, but probably <i>should not</i>...
Cool as a proof of concept- realistically I'd be stunned if this didn't punish your conversions.<p>The scrolling experience was klunky, and because of the way it cuts off text, you're forced to completely load the new frame and drop all context from the last..