My fav is that one song from Kingdom Hearts. The person who sings it is awesome!! (myfriend has her CD) But here's a few, but my link stuff isn't working
sweatdrop :
Blood+ "Colors of the Heart" by UVERworld
Death Note "What's Up People?" and "Zetsubou Billy" by Maximum Hormone
The first opening to Elfen Lied
Bleach "Aterisk" and a few others
Noir "Copella's Coffin" or in Jap. "Kopperia no Hitsugi"
Also a song from .hack//Roots, but I can't remember the name. Starts with b.
Btw, if you go to www.animewallpapers.com and click lyrics, they have the tranlations and videos for anime openings and endings labeld from when they showed up.