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 [...]

Apparently I’m not cynical enough just yet — LJ’s managed to do something even more stupid than I anticipated.
Between that and my efforts to get my blog up and running again, I’ve decided to try out this Wordpress-to-LJ Crossposter plugin.
The setup seems very straightforward — here’s hoping it actually is.