MarioE/InfiniteSigns — pull request #4 by CoderCow (2012-11-29 14:37:51+00:00)
Title: Adds More Possibilities for Foreign Plugins to Cooperate With Infinite Signs

And this is how a runtime binding might be created:
https://gist.github.com/4169439

Couldn't come up with a better way to get a reference of the plugin object, except accessing the internal Terraria.ProgramServer class what I would like to avoid.