Today in Mobile

The Wall Street Journal is reporting that Millennial Media is planning to public early next year, citing an unnamed source. Millennial doesn’t grab as many headlines as some others in the space, but it certainly grabs market share: It claims about 17 percent of the U.S. market, according to IDC, second to Google’s 24 percent but more than Apple’s 15 percent. Those figures illustrate just how competitive the mobile-ad space remains, and Millennial has done an amazing job competing against much bigger players. And with the market finally coming into its own — it’s set to double next year to $4.1 billion, according to IDC — there will be an enormous amount of opportunity in the coming months and years.