What happen if I Digg each of my blog post? It will be a great way of link building? I am concerning that google may ignore more links from same domain or even may penalize my site? Advice pls
Digg.com now is nofollow. so Google will follow it and index it but not count as a vote to your site.
If you're digging your own posts A LOT , digg might consider it spam and close your account. As far as google ignoring it - Digg have recently nofollowed submissions that don't get 'dugg' by a lot of users, so google will simply ignore you anyway unless you're really popular
I suggest you only digg those posts that you think are BEST topic. And if ever the post you digg is really is interesting then for sure that will bring good traffic to your site, I mean to your other post.
Digg your posts if you want traffic otherwise Digg is of no use, no backlinks as mentioned earlier "NoFollow"
only for people it 'trusts' http://blog.digg.com/?p=864 http://digg.com/tech_news/Digg_Starts_Nofollow_ing_Links_That_It_Doesn_t_Trust
It suggest you to digg your popular topic with keyword. It is great way to drive amount of traffic to your site. Also post digg URL to your social networking account it will also benefited you for visitors purpose.