Quick easy post possible somehow?

I′m planning on using WP as a intranet site. As simple as possible, just pretty much having a continuous flow of posts regarding company news.

I would like to have coworkers posting when they want to contribute with info.

So…is there any way of getting this done? I′m thinking maybe like a quick post feature always visible in the sidebar or so. Just so anyone can easily add info to the blog/intranet without having to log in as a admin.

And I don′t really like the idea with using mail as a way either. Just want it to be easy, user-friendly and clean.

Any ideas?