Most noticeably, there is a Non-Player Character (NPC) named "Roderick Neeker-Friend." He LOVES the Midgewater Marshes, and comments on how "most folks don't like the smell, or the damp, but I do." He even keeps a pet Neekerbreeker (the supremely annoying and suddenly agressive large insects that live in the marshes.) His pet's name is "Sniken." Rearrange those letters, and what do you get?
Later on, I run into a quest where you have to gather wild mushrooms from a bog along the Brandywine River. This bog is infested with huge slimy slugs. I was fighting one of these, and all of a sudden my character was struggling to move!
Still later on, I run into a young lady who is having trouble with nightmares. She also likes spending time exploring the bogs in her part of Middle Earth. But one day she met this "lady" (more like an evil spirit, I guess.) Now, the Norbogs (bigger, evil versions of Neekerbreekers) are singing to her- the same song the "lady" sang to her when she was trying to lure the girl into the bogs.
Anyway, sounds like at least one of the game developers for LOTRO is "one of us."