Yes. It's better than two way links. However it's not easy to get this kind of links,especially some valuable links. You usually need to pay for them.
Oneway link is good for buliding traffic. You know larege high quality backlinks>> better indexed rank in SE>>more clicks from SE>> more traffic.
Article marketing is a fantastic way to get links to your sites. Popular article directory submission sites are ezine and article city. I also know blogs can be very powerful tools too. I'm a PR pro and one of my client gets 18% of her traffic from her blog (33% from her Facebook page!).
Powerful links come from news sites too. Get some PR for yourself and get some amazing link juice from powerful, journalistic sources.
Find your story idea, develop a solid media list and go for it! HandleYourOwnPR.com has some good advice for you too.