Converting CIImage to CVImageBuffer

FROM : John Smith
DATE : Mon Jun 09 22:03:56 2008

I have a CIImage that is the result of applying a CIFilter on another image.
Now I want to convert the result image into a CVImageBuffer. Is there some
straight-forward way to do this?
I've spent quite some time scanning the documentation to figure out a way to
do so, but no luck.

Thanks,
John