My FI and I have been going back and forth on this. I thought that it would be nice to get on the microphone after the toasts and quickly say thank you to the guests for coming. Then, a family friend would say grace, and dinner would be served. We are hosting the wedding ourselves, so our parents aren't planning on making any speeches.
My FI thinks that because we are having a receiving line at the start of the reception and will be saying thank you to people then, saying it again after the toast would be strange/repetitive. Also, he thinks it's strange to give a speech at your own wedding.