I stopped blogging a coupla years ago when the spam problem was simply unbearable, and as I had hosted MT on my own server, I was just too busy / daunted to fool with upgrades or adding special sauce to do something about it.
My solution was to outsource: I signed up for Typepad so that i didn't have to think about maintaining the software, and I'm sure they do as good a job on the spam problem as can be done. But since this is hosted on a different URL than before (blog.unixwiz.net versus unixwiz.net/blog) I figured I had to create redirects from my main website to all the entries on the new one. Yet another thing on my todo list that I haven't gotten to.
A year later I'm finally getting around to it, so we'll see if I can power through this and make it live again.
I've been keeping a list of topics I wish to write about: time will tell whether I actually keep it up.