I'm not a big fan of the "link exchange" concept. I think it's generally a lot of work (contacting site owners and begging for links) and there is very little return (low response rate and poor links). However, LookForLinks.com has put together exactly the right formula: it's next to zero work, even the most expensive option is almost no money, and the links are automatic and valid. This is the very best way for any website owner to implement a link exchange program.
Chris Ellington
Article Marketer