But they don't scale very well for a team - specifically a Software Product Team.
The use case is a bit different for software. You need to map everything to a feature - or a feature set. And soon you need to prioritise a collection of features - a super critical decision.
How do you manage it? How would you improve it?
I am the author or Contextualise, a topic maps-based (personal and collaborative) knowledge management application, so I am biased :)