Google exec Wayne Lin will today announce Google AdPlanner, a tool to help online media buyers target certain demographics. For example, advertisers pleased with their demographic mix on one site could use AdPlanner to find it elsewhere. The New York Times expects Lin to call AdPlanner a tool for agencies, but don't be fooled. AdPlanner will eventually become the dashboard Google's chief ad sales guy Tim Armstrong last promised marketers in March. The one that marketing departments will eventually be able to use to manage TV, radio print, search and display campaigns all in one place. You know, instead of paying a premium for some media buyer to do it.