I've read that Yahoo does follow links whether they are nofollow or not, and it seems like a reasonable assumption, considering that most sites have a higher number of recognized backlinks in Yahoo vs. Google.<br /><br />I would think that they would also place more authority on links coming from their own Answers site, especially if those links are in the "Best Answers" position.<br /><br />Strictly SEO speaking, I have not seen major benefits from having links in Yahoo Answers. I have seen significant traffic from Yahoo Answers when the link is picked as the best answer, as people who are looking at that question are already interested in relevant links about that topic, so they are more likely to click on them.