In the 2½ years I’ve been blogging, I’ve thought occasionally about who writes blogs, who reads blogs, what value they provide and (most of all) whether it’s something I should be doing. Among people I know or follow, some occasionally blog with long articles, while some blog with very short referrals to existing articles and little if any marginal commentary. Others have given up on blogging and just tweet, and a handful both blog and tweet while running their day job.