What to use for this: blog? journal ? articles?

[Bellinis]

To some users on my board I would like to give the ability to post articles which can be update daily. For example a review of the stock exchange or the weather forcast.

Currently such posts are just posted in one loooong thread, mixed with people's comments and as you can understand, this gets really messy!

What I would like:

• The authors should be able to make a post the same way the forum works
• The latest topic should allways be on top
• People should be able to comment the posts, but these comments should not be mixed with the actual post.

Now, what alternative do I have?

I'm using vbulletin 3.6.4

I'm sure something like this already exists, but what would be the best?
Hope someone can advise me here