Possible Clues:

• Unfinished American city opens in chaos and it divides Europe and the New World
• East Coast ocean
• Brit's pond
• Main computer network in roof space
• -
• Country mostly found in Greek body of water?
• Small network occupying top floor, in the main
• Europe/America separator, with 'the'
• Monopoly avenue next to the B.&O. Railroad
• Monopoly avenue