When gathering a social bookmarking site list it’s important to note that most of the top sites don’t use a similar theme or code to power their website. This is why you see differences in the major ones such as reddit, twitter, digg, stumbleupon, pinterest and delicious. However, there are also thousands of other sites you can submit to that are usually powered by a similar piece of code. These lists change literally every day so unless you search for them actively in the search engines it’s much easier to rely on a fully automated service such as Bookmarking Beast http://www.bookmarkingbeast.com to update, submit and give you full reporting each month.