I am thinking of tagging my posts, particularly ones that deviate from the main topic of this blog. "topic keywords" would appear in square brackets [ ]. I have seen some email lists already use this for specifying sub-topics, and it seems like a good idea. Another plus is that it opens the possibility of doing tag magic with my post, del.icio.us - style. (which I already do there, externally). If anyone knows of improvements on this scheme, please speak up!