Namely, the modules that were repackaged into flup. What this means is that the py-lib versions will not be updated anymore. I plan to eventually to delete the affected files from py-lib, but not for some time.
HOWEVER, I will continue to update fcgi.py and session.py in py-lib. I realize the non-packaged versions of these modules are somewhat popular and convenient to have around. (e.g. No need to install the entire flup package if all you're interested in is the FastCGI WSGI module.)
Regardless, I encourage all new code to use flup instead, and all old code to be ported to flup. (C'mon! After installing flup, it just requires a single change to the import statement. )