Dang, I've been stupid enough to buy this one now...
It's a really good game, much better than World of Warcraft (in my opinion), and the graphics is very good as well...
http://www.lotro.com/index.php?page_id=116&siid=27
Haven't tested the Monster Play system yet, but that one looks like a very nice addition
http://www.lotro.com/article/313
I don't have much time to play, so it'll probably take a year+ to reach high levels..
The music system is quite "interesting"..
http://www.lotro.com/article/328
Here's a couple of "music videos" I've found on youtube.
They're played using the keyboard...