Anyone who knows me will know thats it not such a good idea to try and set your watch by the regularity of my blog postings… 
My enthusiasm (and spare time!) kind of comes and goes…
Nontheless, I spend at least a couple of minutes a day on my blog. Why? *&^*&^Y&*&^ Spam comments! Even though 99% of the comments go to moderation (depriving them of their valuable link count for search rankings), I still need to go in and clean them up. What seems to happen is their automated tools post an innocuous comment like “test” (which gets through the comment spam filter), and when they see that postings go online, they hammer away adding link after link (which goes straight into limbo, awaiting moderation).
When I have an infinite amount of spare time, I might try and get some captchas working. In the meantime, comments are now turned off. 