Try
www.bmf.com.br They do have the Brazil -50 index futures contract.
Price quoted in index points times the Brazilian Real.
Price moves in incriments on one point.
As for brokers don't know about that one.
You might want to check out the volume going through. Brazil is an emerging market thats on its way to becoming a major player in the world so a lot of opportunity for growth there.
Edit: Trading volume on the indicies as a whole is not too bad, approx 75k contracts a day (better than here in Aus!) so it puts it in the same zone as the YM.