evan_tech is now a community, and not a "shared journal" (which was the hack that existed before LJ had communities). You can now add tags to my entries going to the entry view and hitting the tag button in the button bar -- if you look at this journal directly, by clicking the title of an entry then hitting the tag button in the button bar at the top.
For example, the project tag is just the entries about projects I've worked on. These also show up in the RSS and Atom feeds, which means your aggregator may allow you to skip all of my haskell posts. ;)
I'm not sure how useful this is, but I'll play with it for a bit.