Quim wrote earlier on why red hearts matter in maemo news. The red hearts are important as they bring important news items forward in the maemo social news aggregator. But sometimes there are also news items that are not at all relevant to the maemo community. To solve the problem with them we've now added a burying option:
When you click the "Thumbs down" icon the item will enter a recalculation queue, and will soon disappear from the social news main page. It will of course remain in the news feed it came from, so everything for example coming from Planet maemo subscriptions will stay there.
The item will also be marked as buried for you: