*sighs* Let's try that again...
Ok, it seems there isn't much. There is
lordoftherings which has 27 members and hasn't been active since 2004. No mention as to whether it's a slash-friendly community. There's a hobbit community that doesn't ever seem to have gotten off the ground -
hobbitsandsoon - and that one lists slash as an interest *g*
Dragonlance. Nothing at all in existence. I know... that one was a long shot ;)
I think I might be up for creating a Lord of the Rings slash community for if more people arrive here, and a Dragonlance one.