Work began in earnest this week on South Street Seaport’s ice rink, which is expected to open soon. General Growth Properties, the Seaport mall’s operator, had hoped to open the rink Thanksgiving weekend, but hit a snag when materials arrived late. Executives are not sure yet of the exact opening date but think it will not be too much longer. Check DowntownExpress.com to find out when the rink will open.