Does google and yahoo bookmark give any seo benefit?

[Paul Benoit]

You won't get direct SEO benefit from bookmarking them yourself. Other users of Google and Yahoo could enjoy your page enough to link it off their own pages; that will increase your seo. The number of users who link to your site indicate to the search engines that you have content of value and it appeals enough to people that it is worth linking.

If you look at a Google bookmark list, you'll notice that it doesn't actually link to your site, instead it links to Google with a redirect. That removes the value you would have received with a static link on a page. Look in the source for an example of a Google bookmark list.

Share as much valuable content as you can, that is what will generate the best SEO value.