StreamComputing launched an educational initiative this week that aims to get more developers to study and use OpenCL in their projects. Within this project, up to 20 collaborators will port as many GEGL operations to OpenCL as possible. There is tons of work to be done, but the benefit is that your code will be running in GIMP.
Vincent Hindriksen and Adel Johar organized this project to help programmers to educate themselves.
If you are interested in learning OpenCL and helping GEGL and GIMP get hardware acceleration for more of their features, email Vincent.