I’ve tweaked the plugin to include the related link in LJ crossposts, so folks can make with the clickie directly, as opposed to needing to come directly to the post.
Information on how it was done is available here, in case anyone else is trying to figure out how to add their own custom fields.
Apologies to [...]

Everything’s kinda borked, let’s see if we can figure out why.
Edit, 3:25pm: My slightly unconventional use of The Loop came back to bite me in the ass.