One of the things about blogs that I find interesting is the conversational feel they all have - despite responses being spaced by hours or more. Thus if you do think of the absolute killer rejoinder to end all snappy comebacks, you can Publish Post at that time and look really clever - instead of feeling like a twit on the staircase.
IOW, think of this as yet another source for almost timely responses to the day's outrages. Or possibly yesterday's. Or maybe even longer back than that - I'm kinda lazy.