Currently it's not possible to see which features are assigned to which user except by:
This makes it hard to have a quick overview of who is responsible for what, or whether or not they are overcommitted. As a PM I want to have this information at my fingertips.
This is possible via Custom feature cards. You can read more about this capability here: http://blog.aha.io/customize-feature-cards/
Thanks for the suggestion. This is something we may look at it in the future.
In the meantime, have you seen the Features->Workflow screen? You can enable this screen from Settings->Product->Configure, and this will show you a view that organizes features assigned to each person.
Agreed, being able to see in a current sprint which feature is assigned to who as a view of the board (not just list) would help both PM and also the team considerably