I’ve hacked together code so the XSLTRenderer plugin can now use libxslt to do the transformations on the server side. This should be more efficient than shelling out to xsltproc all the time. If I hack away on modpython stuff tomorrow then I might see about getting it to cache the already read stylesheet in memory. This would reduce another disk read and make server side rendering even faster. Yay.
Also, I haven’t heard of anyone else who is using it. I had a few people download copies of it, but no emails about it yet. I’ll submit it to the pyblosxom plugins page after I do a bit more testing of it. In the mean time feel free to email me about it. You can download the new version from my projects page.