I'm not sure, but it does have wild n' crazy NIMBYs.
Keep in mind the best views of the skyline are all monopolized by MIT's river frontage. Cambridgeport looks out over BU and the Doubletree, so the skyline views here aren't the sexiest possible.
There's also very little transit along the Charles in Cambridgeport; it's a long walk to the Red Line at Central. Makes high density development more difficult.