Over the past few days I've installed a whole bunch (approximately three) of new WordPress plugins on this site.
The first plugin I installed was one to make the rel="nofollow" go away. It is automatically inserted by WordPress in links in comments. There has been a little bit of discussion on the nofollow directive around the place lately and I'm siding with the dofollow camp. My reasons for siding with dofollow are explained much better by others around the place, including the authors of the various dofollow plugins that are available1. I went with this one, for no particular reason. It does the job.
The third plugin I in installed was the most excellent Subscribe to Comments plugin. Normally I wouldn't expect anyone to bother subscribing to comments considering I get them only very occasionally. However, it should be useful for people who are using the Footnotes Plugin.
I also installed a fourth, the Official Comments plugin. It isn't doing much yet, but it will. All of these plugins will come in handy when I do a site wide re-design planned for later in the year (after I finish uni - if only it would happen faster, with less effort required).