I know the word "genius" is thrown around to the point where it has has lost all meaning, especially when it comes to music, but I'd like to know a musician working today that you would consider a true musical genius. Bonus points for links.

My choice at the moment is the French composer Yann Tiersen. You probably know him as the guy that did the Amelie soundtrack. I can and have listened to his music for hours on end. I've probably listened to the Amelie soundtrack more than any other album in my life. His work beyond Amelie is also brilliant.
http://en.wikipedia.org/wiki/Yann_Tiersen

Here is some of his music (ignore the retarded homemade videos):

Les Jours Heureux - http://www.youtube.com/watch?v=ePJJQ3uWciA
C'était Ici - http://www.youtube.com/watch?v=MfMj5abFUt4
Comptine d'été n°17 - http://www.youtube.com/watch?v=VeoX9Uk7hN0 (couldn't find the superior toy piano version)
Comptine d'été n°3 - http://www.youtube.com/watch?v=9Z1OHbnSjmc
La Valse D'Amelie - http://www.youtube.com/watch?v=RD3WwM6l1J0 (I prefer the accordion version, couldn't find it)
La Noyée - http://www.youtube.com/watch?v=ZaBcs0NEc6w
Les Deux Pianos - http://www.youtube.com/watch?v=0TWrJZ1tUGY
L'Absente - http://www.youtube.com/watch?v=9wIbylO24gE (the last third is incredible)