looks like wx-widgets 2.8 to 3.0 moved the distro path, this comes back clean:
./configure --with-boost=/opt/local/include --with-wx-config=/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0/bin/wx-config --with-wx-prefix=/opt/local/Library/Frameworks/wxWidgets.framework/Versions/wxWidgets/3.0

