See the Data Doctors Project page for information on joining.
Hi there is now a separate db_errors badge. I think I've given it to everyone who officially joined the project, but if I missed you, let me know.
Let me point out that if you didn't ask for the Profile Improvement Badge before, I would have no way of knowing you were working on the project. So those of you who are asking now, I didn't forget you, but I didn't know about you.
The badge and the name have changed
UPDATE Aug. 5, 2016. Since Aleš is now a leader, after you read the project page, please send Aleš a message asking for the badge