WikiAnswers shows up on google for tons of searches (it's a PR7). Now you can get your own link on their without even having to answer a post. The first thing you do is create an account. Then search for questions in your niche. Now open up all of your questions and on the left hand sidebar there is a button that says Add Related Links. Click on it and add your anchor text on Title and your hyperlink where it says URL. Click on Add Link and welcome to the wonderful world of free traffic. Now rinse and repeat. Some of your links will get deleted, but I've had links last a very long time doing this. This is one of the easiest free traffic techniques out there right now. Of course some of it can be hit and miss. A lot of your links will never get traffic, but the one's that do will keep your site busy. Another thing if you find it's not allowing you to click the Add Link button just add a couple of letters or backspace and change the letters and then once the Add Link button is active again put in your real link. This site doesn't have the traffic yahoo answers has, but it's easier and faster to get a link back to your site and the bonus you can use any anchor text you want.