The domain with options.
The .co domain has two meanings: First and foremost, it's the country code for Colombia. But it's also one of the hottest domains on the market, and is commonly used for companies. So where does .net.co fit in? Well say your business does networking for other companies. A .net.co domain would be a perfect fit. Or you could go the country-code route if you run a networking company based in Colombia. And if you have a cool company name that ends in "net," you could do some fun domain hacking with .net.co, too. Point is, it's a domain with some options, and we all like options.