<blockquote>
I can't upgrade to GNOME 3 because it insists on needing 3d acceleration... I'm yet to be convinced that this is desirable or necessary</blockquote>
<p>This is a common misconception that this has something to do with 3d, probably because of all the wacky compiz effects, but this is really only about having GPU acceleration or not. In the next version they are no longer blacklisting Gallium/llvmpipe for accelerated graphics using the main CPU so you should be able to get the same graphics even without a working GPU, although offloading to a GPU is best.