I received a message that the plugin "generated ___ characters of unexpected output" upon activation. I couldn't detect any immediate problems resulting from whatever this "unexpected output" was, but I guess it's worth bringing up.
Adding new taxonomies is a little buggy. Sometimes I was able to create a taxonomy successfully and sometimes the taxonomy I created just vanished.
The problem seems to be mostly with taxonomies for links. I'm able to create the links taxonomies but can't access them within post editing or within the links panel.
Nonetheless I appreciate your efforts and I might be able to get this to work for my needs anyway.