can anyone here post some yahoo search statistics in comparison to google's? like who uses who more and what not. kind of wondering if i should start using meta tags again for SEO if yahoo can provide quite a bit of traffic.
Meta Tags? As in meta description? You should be using that anyway as it is what google pulls in for the site descriptor in search results. meta keywords on the other hand are not used by any search engine so don't bother including those to try and rank in Yahoo. Remember that yahoo is now powered by Bing so the same tactics are needed. As for user statistics I don't know any outside of each search engine market share to be honest.
I think you should also focus on keywords and adding fresh content to your site on a regular basis. Good content and keywords can help with rankings too.
Don't think for paid submission or automatically submission. You can do Proper SEO and do links manually. Manually links gives more better result. And submit your links on high PR sites and for yahoo post it manually in yahoo search engine.
Yahoo consider highest quality content and keyword saturation. So doing other SEO methods. Consider mostly about the quality of content.