The Coding Monkeys have released Port Map, an application to make accessing computers behind firewalls NATs easier. Unlike Copilot, which tries to work around obstinate routers, Port Map focuses on providing an easy and consistent interface for reconfiguring them. It’s hardly perfect for everything—notably, you have to have permissions to reconfigure the router causing you difficulty, making it unsuitable for corporate environments—but I can see it being quite handy if you’re just trying to ensure you can reach your home computer from work to grab a couple of MP3s.