DelBobcat,
You are in a better position to know than I am, but I had heard a few years ago that Delaware was interested in the MAC, particularly if JMU came along for the ride. I don't live in Delaware, but I once stayed at a Holiday Inn Express there . . . well actually at my aunt's cottage in Bethany Beach (used to be our regular summer vacation spot).
Well I won't pretend to have any insider information but I feel like the general consensus among fans (I go to every home game and also went to the Villanova game this year) is that they are very happy being a big dog in FCS and aren't interested in becoming a small fish in FBS.
With that being said, UD is in the midst of upgrading all of their athletic facilities. You can make of that what you will.
As for Bethany Beach, it's very nice, but I'm more of a Dewey Beach guy myself. You can't beat a bucket of Coronas with your feet in the sand bay side at Que Pasa.