One method of building links to sites that are one-way links is article building. In 2005 Directory submissions was the big goal of many SEOs. The direction we are seeing now is article building.
Quality articles can bring in links, traffic and even buyers of products and services, so they are vastly seen as important in today's linking strategies.
Since everyone is crazy for one-way links, articles are offering some websites content in exchange for links. So articles will be worth their weight in gold.