When I used Digg today to submit a link of my website,I saw that it don't link directly to my website, but show my website within digg.com domain, so it will not help me get indexed in google ? because there is no backlink from digg ?? Whay do you think ?
submit your link to digg increase the chance being seen by other users, if your content is really interesting, it can bring you huge traffic. I don know the case of others, but digg helpped my site indexed.
If you're logged in to Digg, you'll see a link to a framed version of your content with a Digg.com domain. Yeah. If you're logged out (and this is what the spiders see) its a direct link with nofollow. Basically, there's no link juice from Digg unless you hit the front page.