JPEG2000 support for Imaging is working quite well. It uses
OpenJPEG library written in C compiled to object files (that is
the reason why it won't be included in library core - no native Pascal).
It works with Delphi (C lib compiled by C++ Builder) and Free Pascal
(C lib compiled by Visual Studio 2005). It is Win32 only now but I hope I will
manage to get it working in Linux soon.