I am using Socialmarker as i find it easier to handle, having said that there are a few more Social Bookmarking sites that you can try:
http://www.blinklist.com/
http://del.icio.us/
http://www.fark.com
http://www.gifttagging.com/
http://www.wists.com/
http://lilisto.com/
http://www.faved.net
http://www.spurl.net/
http://www.blummy.com/
http://buddymarks.com/
http://www.linkagogo.com/
http://tag.zurpy.com/
http://de.lirio.us/
http://www.furl.net/
http://www.givealink.org/
http://netvouz.com/
http://simpy.com/
http://www.netvouz.com/
http://www.oyax.com/
http://www.rawsugar.com/
http://www.linkfilter.net/
http://www.lookmarks.com/
http://reader2.com/
http://www.connectedy.com/
http://de.lirio.us/
http://www.citeulike.org/
http://www.fuzzfizz.com/
http://linkroll.com/
http://myweb2.search.yahoo.com/
http://www.simpy.com/
http://www.spurl.net/
http://www.tagza.com/
http://www.urlex.info/
http://www.web-feeds.com/
http://scuttle.org/
http://unalog.com/
http://bookmarks.linuxquestions.org/
http://www.blogmarks.net/
http://feedmarker.com/
http://www.feedmelinks.com/
http://www.flipskipper.com/
http://www.indiagram.com/
http://www.jots.com/
http://www.leze.de/
http://www.shadows.com/
http://openbm.de/
http://www.sitetagger.com/
http://loom.delymyth.net/
http://blogmarks.net
http://smarking.com/
http://segnalo.com/
http://www.shadows.com/
http://www.simpy.com/
http://www.feedmarker.com/
http://ma.gnolia.com/
http://myweb2.search.yahoo.com/
http://feedmelinks.com/portal
http://unalog.com/
http://www.linkroll.com/
http://www.looklater.com/
http://www.hyperlinkomatic.com/
http://blogmarks.net/
http://www.listible.com/
http://www.digg.com/
http://www.blinklist.com/
http://www.diigo.com/
http://ihm.igcity.net/index.html
http://www.tektag.com/
http://cloudytags.com/
http://www.a1-webmarks.com/
http://www.dealoid.com/
http://www.profittips.com/tags/
http://www.excites.com/
http://www.mysitevote.com/
http://www.articlesarchieve.com/
http://www.article-publishers.com/
http://www.gd-sites.com/
http://www.searchallinone.com/
http://www.mobiseer.com/
http://www.stirrdup.com/
http://www.bringr.com/
http://www.bookmark4you.com/
http://www.cylive.com/
http://www.blogmarks.net/
http://www.chaamp.com/
http://www.wirefan.com/
http://www.linkatopia.com/
http://www.thebeststuffintheworld.com/
http://www.socialbookmarking.org/
http://www.tagtooga.com/
http://www.tallstreet.com/
http://www.goesby.com/
http://joel.reddit.com/
http://www.i89.us/
http://myweb2.search.yahoo.com/
http://cheatingspouse.learn.to/
http://www.connotea.org/
http://www.kaboodle.com/
http://www.wists.com/
http://www.tabmarks.com/
http://www.zaadz.com/
http://www.zurpy.com/
http://www.taggly.com/
http://otavo.com/
http://www.rawsugar.com/
http://www.scuttle.org/
http://www.backflip.com/
http://www.mecanbe.com/
http://www.getboo.com/
http://blogmemes.net/
http://clipmarks.com/
http://www.feedmarker.com/
http://maple.nu/
http://www.web20toolbar.com/
http://www.sirlook.com/
http://www.linkologia.pl/
http://www.estateplanningmall.com/
http://www.bookkit.com/
http://segnalo.com/
http://www.eigology.com/dogear/
http://www.linkroll.com/
http://www.uvouch.com/
http://www.sitetagger.com/
http://www.clickindia.com/
http://1-google--swicki.eurekster.com/
http://babblz.com/
http://spotback.com/users/expertmovie
http://www.socialbookmarksubmitter.c...hp/expertmovie
http://www.webmunism.com/
http://www.gii.in/bookmarks/bookmarks.php/expertmovie
http://www.lookmarks.com/
http://www.portachi.com/
http://www.lifeslot.com/
http://www.faimous.com/
http://www.30daytags.com/
http://www.feedmelinks.com/
http://unalog.com/
http://www.rrove.com/
http://teachershare.org/
http://watvindenwijover.nl/
http://www.articlesnatch.com/tags/
http://www.taxsecretsexposed.com/tags/
