Well I just read that some beta drivers from Nvidia have OpenGL 3.2 support! So I am assuming that SIGGRAPH will have a talk about GL3.2 and GLSL 1.5.
Glad to see speedy revisions to OpenGL!
Check this topic about OpenGL 3.2 in the nvidia beta drivers:
http://www.opengl.org/discussion_boards/ubbthreads.php?ubb=showflat&Number=261130#Post261130