By request I have added the option of relating post by Categories as an alternative to Tags. And I changed the name again. The plugin is now called “A Related Posts Widget – ELI”. I stuck my name in there at the end so that people who know me and want my plugin would have a way to tell the one I wrote from all the others. I also added a screenshot to the plugin download page via the readme file.
F.Y.I. – Now more than 200 downloads!