This is great news, actually. I've been following the improvements on this module since you've taken it over from the previous maintainer, it has seen tremendous improvements. All I can say is just keep up the good work!
I have used 0.55 for my personal project, but I have to say with 0.56 and GLSL, things will be much easier for my code.
Comment on Re: POGL 0.56 Abstracts ARB, Cg and GLSL