I think that the Title of the post should serve as the category, that is, if you have a descriptive title, it will be more likely to show up in a search for the keywords you want to match.

kudra addressed this issue a while back in her post Suggestion for post-naming convention.

As for art vs. religion - well, I haven't really had any religious experiences while programming yet - but I can definetly attest to programming being an art form. I liken my religion to those moments when I am meditating, and typing and meditating don't go together well for me. Sometimes I find that programming takes away from my meditation experiences, but meditating always helps my programming experiences.