Craig Newmark already has tormented newspapers by creating a Web site where anyone can post ads at little or no cost, capturing an ever-growing share of the classified advertising market that had been one of the industry's most dependable sources of revenue. Now, the founder of Craigslist.org is pondering ways to improve upon newspapers. He smells an opportunity, convinced that publishers are more interested in preserving short-term profits than pursuing online audiences who still passionately care about journalism but don't read newspapers. ``There is a lot of change coming and I want to make whatever contribution I can. I'm just...