Neither the network nor the conference have said what the news conference is about, but they were expected to announce the launch of an SEC network.
Southeastern Conference Commissioner Mike Slive and ESPN President John Skipper released a joint statement Monday: "In light of the tragedy in Boston today, we have decided to postpone Tuesday's SEC/ESPN press conference in Atlanta. Our thoughts and prayers go out to all of those affected by these horrible events."
http://accesswdun.com/article/2013/4/260508