I've found a lot of cool plugins, mostly through the MT Plugin Directory and the MT Support Forums. I thought it would be helpful if I put them all in a list with a short description in case anyone would like to duplicate some of the functionality you see here.
.: BlogPings: shows total number of pings that a blog has received.
.: BlogShares: shows the current price and P/E of a share of stock on BlogShares. Gord updated David's original plugin so you can also show available shares, market value, and shares outlink value. You can find the update here.
.: BlogTimes: creates a graphical reproduction of when posts are made over a month. Can be seen at the bottom of my index page or here.
.: CommentLeaders: used to create the list of people that have commented here the most.
.: MT-AllConsuming: used to display the books from my AllConsuming Currently Reading list.
.: MTIfEmpty: used with OnThisDay to display "2002: No entries posted" on days in the past with no posts.
.: Netflix Suite: used to show the movies that I have out, the ones that I've rented and how I've rated them, and the ones in my queue at Netflix.
.: OnThisDay: lists posts from this day in previous years.
.: OtherBlog: used with the RandomEntries plugin to display a random image from Picture Fish in my sidebar. Also used to display the last ten books that I've read and reviewed at BiblioBlog (look under "Reading Material" in the sidebar).
.: PingedURLs: used to display information about pings sent in my individual archives (click on my comments link and look under URLs Pinged).
.: RandomEntries: used with the OtherBlog plugin to display a random image from Picture Fish in my sidebar.
.: WordCount: used to show the number of words in an entry on my index page.