And a second entry in the exciting-discoveries-late-last-night file:

QCRegisterPrivatePatches

Enables dozens of new CoreImage kernels, the previously-described hidden patches, and a few as-of-yet-unseen patches.

Turn it on by bringing up Terminal and typing:

defaults write -g QCRegisterPrivatePatches 1

This release is only compatible with Tiger (10.4).
Please see kineme.net for Leopard-specific informations.

Lo, free of additional charge and import tariffs, one sees:

Checkerboard Image
Color Channels
Color Mixer
Demo Cube
Demo Grid
Demo Sphere
Demo Torus
Flame Image
GLSL Shader
Instant Messaging Status
iTunes Database
Log
Mathematical Expression
Replicate in Time
RSS Parser
Sample & Hold
Signal
String Timecode

and lots of CoreImage kernels:

+ Blur                  CIBilateralFilter
+ Blur                  CICheapBlur
+ Blur                  CIGaussianPyramid
+ Color Adjustment      CIDesaturateGamutMapping
+ Color Adjustment      CIGamutAlarm
+ Color Adjustment      CIGamutClamp
+ Color Adjustment      CIGamutRollOff
+ Color Adjustment      CILuminanceGamutMapping
+ Color Adjustment      CIWhitePoint
+ Color Adjustment      CIOpacity
+ Composite Operation   Add Blend Mode
+ Composite Operation   Alpha Add Blend Mode
+ Composite Operation   Behind Blend Mode
+ Composite Operation   CIMixOver
+ Composite Operation   Hard Mix Blend Mode
+ Composite Operation   Linear Burn Blend Mode
+ Composite Operation   Linear Dodge Blend Mode
+ Composite Operation   Linear Light Blend Mode
+ Composite Operation   Luminescent Permultiply Blend Mode
+ Composite Operation   PinLight Blend Mode
+ Composite Operation   Silhouette Alpha Blend Mode
+ Composite Operation   Silhouette Luma Blend Mode
+ Composite Operation   Stencil Alpha Blend Mode
+ Composite Operation   Stencil Luma Blend Mode
+ Composite Operation   Subtract Blend Mode
+ Composite Operation   Vivid Light Blend Mode
+ Distortion Effect     CIShapedWaterRipple
+ Generator             CIColorWheelGenerator
+ Generator             CIRectangleGenerator
+ Generator             CISumOf8Conics
+ Sharpen               CIRAWSharpen
+ Stylize               CIBayerReconstruction
+ Stylize               CIBayerReconstructionV0
+ Stylize               CIDeBayer
+ Stylize               CIDistanceFieldFromMask
+ Stylize               CIEmboss
+ Stylize               CIHeightFieldFromConstraints
+ Stylize               CILanczosBayerReconstruction
+ Stylize               CIPixelZoom
+ Stylize               CIRefractedMaterial
+ Stylize               CIVideoNoiseFilter
+ Transition            CIRotatingCubeTransition

Woah.