Questions and postings pertaining to the usage of ImageMagick regardless of the interface. This includes the command-line utilities, as well as the C and C++ APIs. Usage questions are like "How do I use ImageMagick to create drop shadows?".
Adding support for 16-bit DIB would take place in coders/dib.c as you probably know. Post your patches here and mention you are releasing them under the ImageMagick license and one of the developers will get them into the distribution.