The more you use sites on the Web for keeping track of our online lives and sharing things with friends, the more you'd like to have a place on your blog to gather them all together. I've had my del.icio.us feeds on my blog for a long time. I also used to put my tweets on my blog. I experimented with a Flickr widget and gave it up.
Now Mark Paschal has released a plugin for Movable Type called Action Streams that does that all nicely. There are dozens of services that you can add. I've included all that I use. You can see the result on the right side of this page under the "What I'm Doing" heading.
I also created a page about what I'm doing around the net that's an expanded version of the sidebar.
Mark has made it easy to add services. I created a plugin to add my personal program queue from IT Conversations in about 15 minutes. If you'd like to do the same, I've made a tarball and some instructions. Now whenever I add a program to my personal program queue, it will show up on my homepage automatically. I like automatic.