Through several rounds of research on intranet portals, we’ve repeatedly reached the same conclusions:

• When Intranet information architectures are structured according to the org chart, employees have a hard time finding their way around. It’s better to structure information according to how people use it, rather than what department owns it.
• Role-based personalization lets portals bring information to users in centralized views, rather than forcing users to navigate an immense information space to find individual (and dispersed) locations.

Social features on intranets take these two trends a step further, creating a “person-structured” intranet IA focused around the individual users as well as other people on the intranet.

CubeTree fares extremely well in comparison with other tools out there according to this article. ;-)