Well, here are some requests i'm looking for, and i believe that these are either very hard to find or haven't been done yet.

Trigun: Philosophy in a cup of tea
Paradise/Eden (not sure of title, but it's the song they play when wolfwood dies)

Cowboy Bebop: Flying teapot
Call me Call me
No Reply
Blue
Gotta Knock a little harder

Wolfs Rain: Pilgrims Snow
Silver River
Hot Dog Wolf

Big O: Now and Forever

Tenchu Wrath of Heaven(Video Game): Sadame

THANKS SHONEN AND SHOUJO!