It seems that this post lasts for few years now but still people offer the techniques those are out to date. Like DIGG has not direct URLs to webistes. I guess the best thing to do is submit your sitemap and great content.
I just signed up and this thread is a lot of help as I am also trying to get indexed on google . This forum would also help you in marketing http://953fc7cox61d03b5l0t7viq9o9.hop.clickbank.net/
You can submit your article to Digg or any other social media site... Get a link to the article or page from some authoritative site! And most importantly make sure what you are publishing is worthy enough to be published to Google!
I am pretty sure if you submit a sitemap and send your url to Google you should be fine, they won't classify you as a spammer. You will only be classified as a spammer if you do this multiple times.
for me its by submitting your site map and linking to high traffic sites is the best way to get index.