“Total Audience Measurement” (TAM).  That’s Arbitron’s term for their in-the-works scheme to count your listeners on whatever platform they’re listening to your station (on radio or online) all in one tidy report. I’ve been thinking a lot about TAM lately, and the closer I look the more questions I have about this latest initiative from our friends in Columbia who have profiting hand over fist from the radio industry even as that industry itself continues to struggle. What pr