I made good use of pyblosxom for many years but its time to move on. Pyblosxom development is no longer very active. Also, its reliance upon file mtimes for entry dates led to old entries popping back up and I had to whack them back down with
touch -d. (Pyblosxom's few date plugins were unappealing for varied reasons.) Finally, when I did get the commenting system to work, I couldn't trust it without moderation, but I never paid enough attention to accept proper comments.
I wrote a python script pyb2pel.py to migrate both the entries and comments from pyblosxom to pelican. (Comments are incorporated into the entry content as "ported/archived.") The script is focused on converting entries read by the html entry parser, but it can easily be extended.