I took the time last night and this morning to go through and add labels/tags for every post I've written on the blog. I tried to keep them as condensed as possible, using as few keywords as I could. I know this doesn't help as much as detailed tags would, but if you remember the gist of the post, you can then at least narrow it.
I also took the time to remove every instance of spam from the comments.
You can see the tags at the bottom of the left-hand navigation bars, arranged from most popular to least.