Thanks for the well-wishes for Bob - she is doing remarkably well, as a friend of mine said she would!
The damsel and the chromis are doing great! The tang seems to have settled down and is not harassing them like he used to.
The six line in the 20g is still ignoring the worms, though he does like to swim into the HOB skimmer overflow box if I fill the tank up high enough. My RBTA clone ended up as puree when it did that... so now I am extra cautious to only fill the tank so the water level barely rises above the overflow vents. Translation: I am topping off the 20g at least twice daily, usually thrice. :P
All in all, things are great - I just need to get the time to get a razor to the glass and take some new full-tank shots!