I need a list of "plugs"

You know like article submition sites....All I know of is....uh...digg

 

Here is a list of 50 article directories from a paid article submission service: http://www.wesubmitarticles.com/article-directories.html

If you need more, search for article submission services that submit to a couple hundred and ask for a list "so you know they aren't going to put it on ffa sites or something blackhat".

 

Reread your post... do you mean social bookmarking sites?

Then look here:
http://ekstreme.com/socializer/?url=http%3A%2F%2Fblah.com%2F&title=Blah