I'm currently collecting links to hiqh PR, dofollow social bookmarking sites. Social bookmarking is the most effective solution if you want to get your site indexed very fast. It can also bring a lot of traffic and subscribers if you write really good articles.

The most important thing is that you're able to bookmark everything you want without being banned. With social bookmars you don't need to spam Digg and other NEWS networks, you can't just bookmark your posts and sites and lots of people will see it.

So, here's the list:

http://delicious.com/ - PR8 - Nofollow. However, delicious is the most popular bookmarking service and with this service you have a very good chance to get many visitors to your site

http://www.spurl.net/ - PR7 - Dofollow, very good if you want your article indexed by SE very fast

Spotback - PR5 - Dofollow. Your bookmark will be on the homepage of this site approximately for an hour. Very good too.

Jumptags - PR5 - Dofollow.

Kirtsy - PR5 - Dofollow.

Searchles - PR5 - Dofollow.

Startaid - PR5 - Dofollow.

Joomocracy - PR5 - Dofollow.

Mobiseer - PR5 - Dofollow.

Quadriot - PR5 - Dofollow.

Url - PR5 - Dofollow.

Dropjack - PR5 - Dofollow.

Faves - PR5 - Dofollow.

Indianpad - PR5 - Dofollow.

Linkagogo - PR5 - Dofollow.

Myhq - PR5 - Dofollow.

Designfloat - PR5 - Dofollow.

Pageactive - PR5 - Dofollow.