Social bookmarking (saving links for your favorite web pages to a public site) has exploded in the last few years in terms of people using social bookmarking services, traffic to the bookmark sites, and the sheer number of me-too services. Here's a summary of some of the services available, and JavaScript links you can copy so your visitors can promote your pages in their bookmarks.
The Granddaddy of All Social Bookmarking Sitesdigg.com - News and web pages. Started out for the techy set, but has expanded to a general interest audience.
Big sites dedicated to social bookmarkingThese sites have from 1-3 million visitors per month according to
Compete.com:
stumbleupon.comreddit.comtechnorati.com - A blog search engine. Tends to have the techy and science crowd.
del.icio.us - A general interest bookmark service. Acquired by Yahoo!
Portal SitesAll the big portals have added their own social bookmarking services.
bookmarks.yahoo.com - One of Yahoo! three or more mookmarking features. Nothing like focusing your business...
facebook.com - The social networking site for college kids and fresh-outs.
favorites.live.com - Microsoft's MSN followon.
favorites.my.aol.com - AOL
google.com/bookmarks - Google's bookmarking feature.
myjeeves.ask.com - Yet another search engine's bookmarking.
myspace.com - The social network for high school kids.
myweb.yahoo.com - Another Yahoo! bookmarking service.
netscape.com - Another AOL one.
Medium Sized VerticalsThese sites focus mostly on social bookmarking and discussion forums, and have between 100,000 and 1,000,000 visitors a month, though not all exclusively to their bookmarking feature:
slashdot.org/bookmark - The discussion site for cranky software developers.
newsvine.com - A general interest user-submitted news links site.
fark.com - News of the weird for the fraternity crowd.
faves.comblinklist.commixx.comfurl.netsegnalo.alice.itdiigo.comSmaller Bookmarking VerticalsThese sites have between 10,000 and 100,000 visitors per month.
ma.gnolia.comnetvouz.comsimpy.combackflip.comspurl.netblogmarks.netlinkagogo.commister-wong.defeedmelinks.com