Continental lease expires in Mar 2013

I was hoping to gain insight from the group as to any leasing activity going on in Dunn County. Our lease with Continental expired this month in Township 142N Range 92 and 93 West and Township 143N Range 92 and 93 West. We have reached out to Continental without response. Does anyone know what recent lease rates are in this area?

Also, is there a formal filing to be done by the MO indicating the minerals are not leased?

Thank you for the wealth of information this forum has provided. It is greatly appreciated.