Install SEOQuake and then check your site in YahooExplorer. That will give you the number of links and the PR of the sites linking to you
Usually social bookmarks are indexed quickly by search engines. However, if it has missed the eyes of search engines, then creating rss feeds of all these links is a good idea and pinging them to rss aggregators will do the trick for you quickly. You can try linklicious that works like charm. Also bulkping is a good option.
You just submitted your website in no. of directory's and also use ping for your website to getting more backlink for your site.