The user profile, accessible to the public, should have a few more things on it than it currently does. When I link my friends to my Bitbucket profile, I want them to contribution statistics!
These things are: Number of projects the user has contributed to/has access to, number of commits they have made, a description of the user (obviously made by the user), contact information.
Next to each project, you should have have a simple number; the number of lines they have contributed (or # of commits).
I'm sure there are others that would be beneficial to.