My latest Boston Globe column looks back at the impact of two initiatives born in Cambridge in 2005: Web Innovators Group and Y Combinator. I also sk what we can do to improve Boston’s stickiness for consumer-oriented Web and mobile startups; it’s impossible to look at the alumni of both programs and not notice that may of the most successful, like Reddit, Dropbox, Birchbox, and E la Carte, have migrated to New York or the Bay Area.