Three important quality of these social bookmarking websites -
Do follow
Direct Links
PR 7 - 3 (PR is variable, we all know)
So start using these sites for your website to get extra DO FOLLOW links
multiply.com
oneview.de
jamespot.com
buddymarks.com
linksilo.de
designfloat.com
tagza.com
claimid.com
a1-webmarks.com
medical-articles.net
jeqq.com
freelink.org
book-marky.de
kwzz.com
postolia.com
stumpedia.com
mylinkvault.com
quickieclick.com
webbiru.com
business-planet.net
oyax.com
kojaxx.com
video-bookmark.com
sbuydigg.com
hope they are benefit for you !