Does anyone know if there is a room for nursing and/or pumping mothers? 
I have a 9 month old who's staying with his Grandma, but I still have to pump throughout the day. I'm going to be spending a lot of time in Lucas Oil Stadium and my hotel room is a prettttty far walk from there. It'd be cool if there was something in between so I didn't have to go all the way back every few hours.

There are indeed. In the ICC, in the hallway that runs away from the main portuon of the dealer hall, the women's restroom there has a nursing station. In the past there has been another in the dealer hall near the family pavilion.

There might be more, those are just the ones I remember my wife using

2 years ago, my wife was nursing our 2 month old at the time. She said the ICC is well equipped for nursing mothers. There were a couple of different rooms, but the main one is in the crossroads corridor as stated above.

Apparently there are lactation suites at LOS.  I hope they’re available during Gen Con.