I selected Angela "webchick" Byron as my co-maintainer for Drupal 7 back in DrupalCon Szeged in August 2008. Since then, together we shepherded efforts of 1,000 core contributors to create Drupal 7, got the release out the door in January of last year, and worked hard thereafter to stabilize Drupal 7, to the point that the number of Drupal 7 sites eclipsed the number of Drupal 6 sites earlier this year.
However, Angela's level of responsibility in the community has grown significantly in the past 3.5 years, and she wears many hats, from Drupal Association board member to code sprint planner to Drupal.org coordinator to evangelist to general community cat herder. We both felt that it was time to transition the role of Drupal 7 core co-maintainer off of her plate, in order to give her more time to focus on her other community roles.
When thinking about replacements for Angela, David Rothstein was at the top of my list. David was a key contributor to Drupal 7 and heavily involved in a wide range of issues throughout the code base. He was also on the Drupal Gardens team, developing against Drupal 7 while it was still in active development, and so has a very thorough and deep understanding of Drupal 7's internals. David is extremely conscientious and thorough in his reviews, and is incredibly calm and respectful in his communication style.
I'm thrilled to say that David accepted the invitation to join the core co-maintainer team, and will have time to work on managing Drupal 7 releases through community time provided by his current employer, Advomatic. David will not be committing to the Drupal 8 branch, but will be focused on guaranteeing the quality of Drupal 7.
Please join me in welcoming David to the core maintainer team!