In October, the site hired a new chief executive, Betsy Morgan, from CBS Interactive, and this summer the site will take an ambitious step by introducing its version of a metropolitan section: local versions for major cities.

Whether readers will follow the site into new areas, however, is an open - and expensive - question. The plan will put The Huffington Post into competition with existing newspapers and, arguably, with companies like Yahoo, AOL and

...said Micah L. Sifry, the editor of the blog "Will people go to The Huffington Post for great sports blogging? They're certainly not going to go see what Arianna says about opening day."

Depending on specifics, HuffPo's local expansion could put the site into competition with local blog networks like Gothamist and Curbed.