So many references! I think I'll be the first one to name them all, though I'll admit, I had to really scan the old memory banks to come up with the one on the bottom right that's been stumping everyone. In fact, I think it was the first anime OAV I ever rented from Blockbuster Video back in the day... o_O
Final Fantasy VII, Akira (Tetsuooo~!), good ol' Spike Spiegel from Cowboy Bebop, DragonBall Z, Ghost in the Shell, Tank Girl, Gorillaz album cover from Demon Days (silhouette version), 60 billion double dollar wanted poster for Vash the Stampede a la Trigun, Tokyami, NERV logo from Neon Genesis Evangelion, Jet Set Radio Future, and--last but not least--Ninja Scroll!
Sally's name doesn't seem to fit her persona, but that's what makes it fun. Epic scythe design, incidentally. Gotta love a well-made reaping tool. Strategic use of light, shading and shadow play make the imagery especially dynamic. You've got a real way with eyes, man. Love the simplicity of the logo and its message, very nice touches.