After a lot of humming, I decided that it wasn’t very practical to use a different platform for every blog I was running on the same machine. Some more puffing led me to conclude that WordPress was the best candidate to replace the likes of SimplePHPBlog and Blogsum. I still have an odd Nanoblogger to migrate, but it is easily maintained and keeps to itself for the moment.
In the process, I had to find ways to import data from the old platforms, and massage it into something that WordPress can work with.