Experts come in all shapes and sizes. Whether a computer programmer at Microsoft, a yogurt specialist at Stonyfield Farms or your next door neighbor, everyone seems to be waxing poetic on their blogs.

Short for “Web logs,” blogs initially emerged as online journals where individuals posted everything from their thoughts on the news of the day to mundane daily occurrences. Yet somehow this, at times, quirky medium exploded into corporate America. A decade ago, law firms began putting up their own Web sites; now blogging is poised to transform how firms use the Internet.