Thanks for the heads up, akkartik!
Nils is a prolific author and has even written non-CS titles to include Yoga and Zen (in German).
Looks interesting though.
Regarding db integration, I recently read a bit on Jarc (arc on Java - http://jarc.sourceforge.net/), and the author specifically added in that ability.
I've switched from Notabug to Gitlab now, because Notabug is being painfully slow.