There is lots of information on the Web about concurrent programming with Java (or with other languages on the JVM). This post is a list of links I have found helpful and/or interesting.
Okay I’m still on the hunt for the elusive dark colour look-and-feel for NetBeans. I found this site that has great information about the NimROD L&F. This sets the widgets to a dark colour (or you could customise your own colours with NimROD).
Note that this is separate from the NetBeans colour themes which control editor colours. For that, I quite like Twilight and Aloha, although each needs tweaking to fix highlight colours for things such as breakpoints and step colours, or for highlighting code differences. Still, it’s a good start.
I spent the past hour fiddling with Konsole, trying to get it to honor my Bash prompt in the title bar (using the usual ESC char tricks you can find anywhere). Finally found it: In the Profile settings, under Tabs, change the tab tiles to %w (or pick “Window title set by Shell” from the drop-down Insert list to the right).