A great tool for journalists who use the iPad. Zite let's you personalise your news consumption down to topic detail and then share and comment on the news your are consuming. According to the site's blurb, "Zite is a personalized iPad magazine that gets smarter as you use it."
Might just replace Flipboard as my preferred iPad news and social media consumption tool.
Please add any experiences of using Zite for news gathering below.