DL announced several months ago that they would start service to ATL from ILG. I think there will be 3 flights/day all on CRJs. The announcement even caught the Airport by surprise. The director of the airport was quoted as saying something to the effect of "we had no idea DL was looking to start service here and now we have some work to do to get ready for them."
I live in Wilmington, but will continue to fly from PHL. 3 flights per day doesn't leave too much flexibility in case of a cancellation or weather delay.
I doubt US is looking at ILG, but I wonder if now that MBNA was purchased by BofA if there isn't enough demand for ILG-CLT service?