Get ready for the next level in the blogosphere. Arianna Huffington, the columnist and onetime candidate for governor of California, is about to move blogging from the realm of the anonymous individual to the realm of the celebrity collective. She has lined up more than 250 of what she calls "the most creative minds" in the country to write a group blog that will range over topics from politics and entertainment to sports and religion. It is essentially a nonstop virtual talk show that will be part of a Web site that will also serve up breaking news around the...