I don't know about VirtualBox and OpenGL, but I just installed Parallels and everything works swimmingly! Better native partition support and what seems like very good OpenGL acceleration.

I also got native partition booting working very quickly in Parallels - I can boot both my native Windows 7 installation and my native Ubuntu installation - that are On Partitions Of The Actual Hard Drive. Took a tiny little bit of nudgework, but now it just goes.