You can create a list of people and then view just their tweets. Twitter keeps this fairly hidden away for whatever reason. So you could have a "News" list or whatever. I think that's what you mean anyway.
Thanks for that. I finally found the 'lists' option. However, compared to Facebook it's a ballache to add users to lists. Also there's no filtering option so retweets (something I dislike about twitter) can't be filtered out :(