[@The Wyrm] Roger on the moonwells origin! I see now it's just a name given by your people to craters filled with water, which is basicly what I suggested anyway so I like that idea! :P

If you really [i]really[/i] want to make your elves interdimensional travellers, I won't stop you. It's an odd background to me, but they're your elves and not mine so what the heck. As long as they indeed can no longer travel through portals, I'm okay with this fix. The odd thing would be the narrative, I think. Elves aren't so powerful (in this world) that they would be able to travel through dimensions. They aren't "aliens", and even this continent has high elves similar to your own.

As for the trolls, dark trolls living there isn't an issue. Maybe there are some ice trolls too, who knows? Seeing as dark trolls are the most magically attuned, it does make sense. It was more the climate I was thinking about. 
As to where the biggest lunarite shard is... I won't tell ;) Seeing as it's a valuable resource, putting you smack dab on top of the biggest one wouldn't be fair to the other players. You don't have to change location if you don't want to. If you feel like you are too far away from the rest of the players though, I would recommend relocating.
Addition: Seeing as Cyclone will be writing your turns and he is okay with you settling near an especially large piece of lunarite, I'll be okay with it too. It won't be the [i]largest[/i], but an especially large chunk submerged in a lake works for me if it works for cyclone.

(We have 4 players in the northern peninsula of the main continent, 1 player on the island to the far south-west, and 1 player in the far east in the marshes. We also have 1 undecided player.)