I'm compiling from git onto 64-bit Natty, which is in Alpha.
Wine's apt-get build-dep script seems to be missing the following.
configure: OpenCL 32-bit development files not found, OpenCL won't be supported. configure: gstreamer-0.10 base plugins 32-bit development files not found, gstreamer support disabled
I was able to find gstreamer but did not find any development files for OpenCL in the Ubuntu repository. I did install this: python-pyopencl but still got the warning.
I know it's too early to mention this, since Natty's still in Alpha.