Hi,
I added support to openGL 2.0 ES on PlayN \o/
To do that I added 2 new files on java package (JavaGLES20 and JavaGLESContext).
I changed JavaImage(just a cast) and JavaGraphics (support to choose between normal and ES version) too.
Have you interest to get it on you project? I can send files to you :)
The big problem is get LWJGL ES version (because it is not on maven, you need to compile it by you self).