c) gtkD looks it's in best shape...works with Phobos and Tango, with D 1.0 and D 2.0, 64 bits support, wraps GTK+ 2.22.x API.Quite good, although a bit behind GTK+ schedule. The problem might be there is only one developer (Mike) working on it.
So he's still working on it? GTK+3 is a major step.
