Chicago has mysteriously become ground central for the local online media battle. The Onion recently launched its entertainment portal, Decider, in Chicago. Huffington Post last month launched its local effort in Chicago. NBC just launched a new affiliate site, NBCChicago.com, that is heavily entertainment-based. Curbed and Eater will be spreading there soon, and EveryBlock also hails from ChiTown. And in addition to the normal Gothamist and MetroBlog presence, Gapers Block has a huge following.