Social Bookmarking Sites

(Sorted by PR and Alexa Ranking, Do Follow and No Follow are noted)

Google Bookmarks: PR N/A - N/A - No Follow
MyWeb Yahoo: PR N/A - N/A - Do Follow
Ask: PR 9 - 53 - No Follow
SlashDot: PR 9 - 9508 - Do Follow
Digg: PR 8 - 293 - Do Follow
Technorati: PR 8 - 407 - No Follow
Squidoo: PR 8 - 554 - Do Follow (Must be lensmaster to post)
StumbleUpon: PR 8 - 1034 - No Follow
Propeller: PR 8 - 1746 - Do Follow
Reddit: PR 8 - 5999 - No Follow
BlinkList: PR 8 - 28117 - No Follow
Mister-Wong: PR 8 - 50162 - Do Follow
NewsVine: PR 7 - 5763 - No Follow
Mixx: PR 7 - 784 - Do Follow
Folkd: PR 7 - 9782 - No Follow
Furl: PR 7 - 22374 - Do Follow
Ma.gnolia: PR 7 - 79348 - Do Follow
Connotea: PR 7 - 86507 - No Follow
Del.icio.us: PR 6 - 2600 - No Follow
Swik: PR 6 - 29969 - No Follow
ThisNext: PR 6 - 5333 - No Follow
JumpTags: PR 6 - 10362 - Do Follow
Diigo: PR 6 - 45519 - No Follow
BlinkBits: PR 6 - 45720 - No Follow
Netvouz: PR 6 - 56311 - No Follow
Kirtsy: PR 6 - 59790 - No Follow
FeedMeLinks: PR 6 - 63724 - Partial Do Follow
Simpy: PR 6 - 79683 - No Follow
FeedMarker: PR 6 - 116527 - Do Follow
Bibsonomy: PR 6 - 119921 - Do Follow
Spurl: PR 6 - 119991 - Do Follow
BackFlip: PR 6 - 140909 - Do Follow
Sphinn: PR 6 - 146175 - No Follow
Lycos IQ: PR 5 - 2851 - Do Follow
IndianPad: PR 5 - 3599 - No Follow
Faves: PR 5 - 8037 - No Follow
GiveALink: PR 5 - 7148 - Do Follow
MyLinkVault: PR 5 - 201602 - Do Follow
CoRank: PR 5 - 29938 - Do Follow
Symbaloo: PR 5 - 37302 - No Follow
Searchles: PR 5 - 42285 - Do Follow
BlogMarks: PR 5 - 50023 - Do Follow (Requires Invite Code)
De.lirio.us: PR 5 - 62246 - No Follow
MyVMarks: PR 5 - 69059 - Do Follow
SpotBack: PR 5 - 25242 - Do Follow
LinkRoll: PR 5 - 35886 - No Follow
BookMarkTracker: PR 5 - 108472 - Do Follow
LinkaGoGo: PR 5 - 126563 - Do Follow
Connectedy: PR 5 - 133798 - Do Follow
BuddyMarks: PR 5 - 168321 - Do Follow
IGooi: PR 5 - 275738 - Do Follow
ShoutWire: PR 4 - 30895 - Do Follow
Oyax: PR 4 - 38314 - Do Follow
BMAccess: PR 4 - 43871 - Do Follow
BUMPzee: PR 4 - 49048 - Do Follow
MyPip: PR 4 - 52303 - Do Follow
Tagza: PR 4 - 55952 - Do Follow
NetRocket: PR 4 - 64624 - Do Follow
SyncOne: PR 4 - 70500 - Do Follow
WireFan: PR 4 - 93912 - No Follow
Ez4U: PR 4 - 112857 - Do Follow
A1-Webmarks: PR 4 - Alexa 184,637 - Do Follow
Yattle: PR 3 - 52877 - Do Follow
PlugIM: PR 3 - 65232 - Do Follow
Dizzed: PR 3 - 85696 - Do Follow
Tedigo: PR 2 - 63894 - Do Follow
Ka-Boom-It: PR 2 - 64427 - Do Follow
YuppMarks: PR 0 - 173057 - No Follow
CiteULike: PR N/A - 14445
Megite: PR N/A - 49834 - No Follow

Online Social Bookmarking Automation Services

These are the services that we've actually used/tested during our social bookmarking activities…
Post Toaster: Currently semi-automates social bookmarking to over 60 social bookmarking and social news sites. It's alittle quirky when you first start using it, but does help speed up your social bookmarking once you get the hang of it. It's one of the few that semi-automates the most sites.
Socializer: Currently semi-automates social bookmarking to 50 sites. Functions much like Post Toaster.
OnlyWire: Currently semi-automates to over 30 sites, but has a much more friendly user interface. You can sign-up for all your accounts in one easy place, and it's one of the few that actually automates pretty much the entire process. Great for those new to social bookmarking.
Social Marker: Currently automates over 40 sites, with a friendly user interface — but still is semi-automatic. Another great one for those new to social bookmarking.

Guitar Dummy: Another great one for those new to social bookmarking.