I may have found a way around this.
http://www.whatonearthcatalog.com/whatonearth/Item_Make-Your-Own-Opoly-Game_AV3832.html
Sure, it not software based but I think if we buy this and then collaborate on board designs, we could come up with some pretty interesting stuff to put on it.
Apparently this is sanctioned by Hasbro as well, so your copyright issues are no more. 

