Say, Rich, just a thought if the folks a Hoopla would be interested/open. Because there is very little real estate for additional text on the right-hand pane, they might consider using tool tips (hover text) on the links for showing the parent forum.
I don't know whether that would work on iPhones and tablets, but on PCs, it certainly would. And, the best part is, they wouldn't have to redesign anything -- just add the tool tip code to the link in whatever routine fashions the link.
(Sorry, I would in online information systems all day. I can't help myself :-)
Tomlinson Run Railroad