This is so self-evidently a good idea that I wonder what I’m missing that’s wrong with it.

Fifteen Chicago websites — some of them hyperlocal, others citywide — have united to form the Chicago Independent Ad Network. Collectively, they are offering advertisers a minimum of one million page views a month. Each month the ad network will sell five ads — 300 x 350 pixels — that will rotate throughout all 15 sites. In the beginning — the service was announced Wednesday and will launch November 1 — each ad will cost $2,400 and the revenues will be divided among the sites prorated by page views.