I don't think the Google Answers model works particularly well. Don't get me wrong - it is great when it does work, as you can get a very well-researched, well-documented answer for a suprisingly low price. But at the same time a lot of questions go unanswered, and a significant percentage of answers run from mediocre to just plain wrong.
I don't think that Google particularly believes that Google Answers is viable. Set up your custom homepage on Google. Add your RSS feed for Yahoo Answers. Easy enough, right? Now add your RSS feed for Google Answers.... oh, there isn't one.