I really enjoy using SU...they are bringing me loads of traffic...I am just curious if there are any similar methods of getting traffic.
Digg is really nothing like SU.. although like Mac sez, if you get Dugg to the front page, you'll have a giant sudden leap in traffic..
Have you qualified the traffic you are getting from Stumble? Frequently these systems generate frontpage traffic only and the users don't go deeper into the site, don't return and don't purchase (or click on ads) If your site is a blog you'll find plenty of sites but make sure you avoid the autosurfing systems. All you have to do is load up your browser and walk away and you are earning credits - how that helps anyone escapes me.
hey dudes... found this today via wikipedia http://3spots.blogspot.com/2006/01/all-social-that-can-bookmark.html quite a good list of them
There's a great post about getting on to the "Popular" page at del.icio.us over at ProBlogger: http://www.problogger.net/archives/2006/01/06/7-ways-to-guarantee-getting-to-the-top-of-the-delicious-popular-page/