Lately I've been trying to come up with some ideas for some new websites, and some of these sites seem to be better suited for software like Scoop than Drupal. I'm actually a member at sevarl Scoop sites and really like the interface, as well as the ability to rate comments and gain Mojo.
The big problem is that Scoop sites are now being targeted by spammers, and there are no effective tools available to help deal with them. The idea that users will vote down story submissions that are full of spam seems to be valid, even on non-tech sites, but the only sites where users gain enough mojo to be able to hide spammy comments seem to be the tech-centric sites. That just doesn't work out well. And if you enable diaries, only admins can delete spammy diary entries.