I like the first solution, but due to the inconvenience in
having to figure out node numbers, maybe you could introduce
some linking 'macros'. For example, if I want to link to
the last node i was at, [last-node] would do it. If i'm
typing at the chatterbox, [this-node] might be useful. In
threaded discussions, [parent-node], [prev-sibling],
[next-sibling], might be moderately useful...
Would this be practical? I'm not sure how the architecture
of perlmonks would make this easy/hard. Personally I think the [last-node]
has the most potential, simply view the page you want to
comment on, then go to the discussion and paste it in.