Seeing that you run a phpBB, you could export news from a certain forum of your phpBB. Each topic in the forum would be a news item and users could post comments on the news by simply replying to the topic in the forum.

I am sure there are mods available to do that with a phpBB. If not, it's not to much trouble to code in PHP.

I dunno, just an idea.

Oh, and you probably want to upgrade to phpBB 2.0.11 since 2.0.10 has security holes.