Business Insider co-founder Dan Frommer joins as editor-at-large
Cain attacks first woman to publicly step forward with charges of unwanted sexual advances as name of earlier accuser surfaces
The two sites have plenty in common -- from heavy aggregation to sensational headlines to fast-driving growth
CEO Henry Blodget also boasted an audience of 12 million uniques a month
The AllThingsD editor objects to the Business Insider editor's post about her Groupon scoop
Blodget: Cash will be used to expand newsroom, "may even allow us to hire a copy editor"