I once read an article discussing on how to gain more traffic on your site.. and finding out that yahoo answers can help to gain more traffic by answering or participating some questions there. is it really true? how? ^_^
Many people think that having a good website is all you need to get tons of visitors. Wrong answer. Getting traffic to your site takes hard work and diligence and is not accomplished overnight. Think about it this way - how are people supposed to know where to find your site if you don't tell them? You must advertise. Here are some proven ways to advertise your site without spending [much] money.
post good question and answer and provide link to your site that really help
Yeah link from yahoo answer can help you lots but in traffics only not in PR. Because as i know till now that yahoo answer use no follow for external links.