Regrettably, it doesn't look like the Dow Mini Futures contract is free on Live Charts. I'm showing a 10 minute delay; I haven't paid the CBOT exchange fees.
But if you want to follow it and evaluate its growth, you can find it under symbol CBOT:YJ01Z.
I did notice on their website, they've reduced their transaction fees to $.05 for members and $1.00 for nonmembers. I don't know how this compares with CME fees, but at least it looks like a step towards bringing in some liquidity to these contracts.
As I write this, volume is 159 contracts for the day, with 129 ticks, so it's mostly....almost only.... 1 lot trades that are going off.