For those interested in the deep technical end of image processing with Adobe products, in a fit of frustration with Adobe's DNG Profile Editor, I've written dcpTool.
dcpTool is a compiler/decompiler for DNG camera profiles (DCP files), as used by Photoshop, Camera Raw and Lightroom. dcpTool can decompile binary format DCP files into an XML format for editing, and then compile the XML format file (editable with a text editor) back into a binary DCP file, as well as extract embedded profiles from image files. It runs on Windows and OS X command lines.
The web site, which also has some background material on DNG Camera Profiles and an example of a "decompiled" one, is here: http://dcptool.sourceforge.net/
Health warning: dcpTool is a command line utility - if you're not comfortable with command line stuff, dcpTool probably won't be of any interest to you.