Social Bookmarking Sites For Traffic

I am not yet a big fan of these social bookmarks sites (digg, delicio.us, stumbleupon etc) yet but it seems they can bring you a lot of traffic! I have been trying stumble upon, asking friends and others who offer free stumbles to stumble this blog and saw an increase in the traffic. Well I have probably got only 5-10 thumbs up, that's not enough but it works, that's what matters.

I'll put up a list of these social bookmark sites when I'll have some time :-)
So, now you know where to go when you need fast traffic.