Changed
People should use their drupal.org username to identify their account.
Implementation
So far, I just changed the field label on the registration form to say "Drupal.org username".
Will this module work? View Drupal.org username field on Drupal.orgDrupal.org username field
Registration
Some users may not have a d.o account yet, and clients submitting projects are not likely to.
Data sync
How can we pull useful info from their account, like starred issues, recent comments, etc.
Can this module be used with profile fields to log in with drupal.org username?
View User Field Login on Drupal.orgUser Field Login
Can External Entities module be used to sync drupal.org data?
Validation
How can we verify that they entered the right account?