Technorati Tags
Technorati is a big huge service that indexes blogs. It also has taken to this tagging bidness. I'm partial to tagging as a fine, messy way of organizing stuff.
So I've added technorati tags to my blog starting... well, now.
I'm using an greasemonkey script to add the tags because I can't be bothered to do all that by hand.
In the future, I'm going to see if I can also make the greasemonkey script bookmark the blogpost on delicious so that all of my posts in any category will show up there as well.