Any references to LOTR, D&D, etc. should probably be more subtle. Like the Dark Elf Amulet -- that was cool. Plus it wasn't in-your-face. I want to find like a "halfling's ring" next to some dead halfling's corpse, and then find some "lord's ring" in a castle... for LOTR references. Hmm, but maybe that's too close to the first one.
Good ideas though!
There are already some of these subtle references in the game : The names of Characters. <img src="/ubbthreads/images/graemlins/biggrin.gif" alt="" />
Alrik is a name from the RPG-System "The Dark Eye" (yes, with this title it's gonna be published in the english-speaking area !) , Arhu is from a novel by Diane Duane (as he told me), and there are some other things like that.