I was in Easton over the weekend. I spoke to a colleague who is a principle player in the Lehigh Valley Revitalization group. She mentioned that the new Lehigh Valley convention Center has been shuttered, and the Sands has halted plans for the hotel to adjoin the new casino on the Bethlehem Steel site.
FYI, the largest venue in the Lehigh Valley now is the Holiday Inn, so in Lancaster we already have several more venues to accommodate large groups than the megopolis of Allentown Bethlehem Easton.
The reason for the demise of the Convention Center (off I - 78) is lack of business.