I have put together some brief information on Tolkien's languages and elves. I will personally be using this as reference (although I know almost all of it by heart already) when conducting RPGs in a fantasy setting which I can twist to make more Tolkien-like. It is also a good way for those familiar with D&D-like fantasy to see where concepts like Dark-elves, High Elves, Wood-elves, etc. came from. So, I figured I might as well make it available to everyone. Check it out here. It was put together using primarily information from There and Back Again, which is a great Tolkien reference site (though still under construction).