Update 50+ Accounts Quickly?

I have created 50+ web 2.0 accounts (Listed below) to help improve my main websites rankings and performance.

Is there a quick way to keep them all, or most of them updated regularly with new content? or manage them efficiently.

How exactly do RSS feeds work?

http://www.amazon.co.uk/gp/pdp/profile/A25OBSS0PNSTPC?ie=UTF8&ref_=sv_w_h__4
http://www.beejive.com/forum/member.php?action=profile&uid=9834
http://www.bebo.com/Profile.jsp?MemberId=11000180405
http://www.bebo.com/Profile.jsp?MemberId=11000181905
http://www.behance.net/RealPeterBruce
http://www.ask.com/answers/profile/3714261/realpeterbruce
http://dribbble.com/RealPeterBruce
http://www.dopplr.com/traveller/RealPeterBruce
http://digg.com/RealPeterBruce
http://realpeterbruce.deviantart.com/
http://designmoo.com/members/realpeterbruce
http://www.delicious.com/RealPeterBruce
http://brightkite.com/people/RealPeterBruce
http://realpeterbruce.blogspot.com/
http://blinklist.com/users/RealPeterBruce
http://www.bing.com/search?q=Real+Peter+Bruce&go=&qs=n&sk=&sc=1-16&form=QBLH&filt=all
http://members.ebay.co.uk/ws/eBayISAPI.dll?ViewUserPage&userid=pb-713
http://themeforest.net/user/RealPeterBruce
http://www.epicurious.com/community/myepi/profile/907319967
http://www.evernote.com/shard/s118/sh/c4751f2b-2f05-433e-8c2f-31e9e2b9fe6f/91ba14ded01500516b03a9ccfc36f299
http://www.facebook.com/RealPeterBruce
http://www.facebook.com/RealPeterBruce2
http://www.facebook.com/RealPeterBruce3
http://www.facebook.com/RealPeterBruceDOTcom
http://www.flickr.com/people/65815729@N03
http://www.fotolog.com/realpeterbruce
http://friendfeed.com/realpeterbruce
http://www.friendster.com/avatars/200278413
http://www.google.co.uk/#hl=en&sugexp=gsih&cp=16&gs_id=26&xhr=t&q=Real+Peter+Bruce&pf=p&sclient=psy&safe=off&source=hp&pbx=1&oq=Real+Peter+Bruce&aq=f&aqi=&aql=&gs_sm=&gs_upl=&fp=1&biw=1366&bih=647&bav=on.2,or.r_gc.r_pw.&cad=b
http://gowalla.com/users/RealPeterBruce
http://hi5.com/friend/profile/displayProfile.do?userid=606822631
http://www.hulu.com/profiles/RealPeterBruce
http://www.icq.com/people/644423756
http://www.ilike.com/user/RealPeterBruce
http://www.last.fm/user/RealPeterBruce
http://www.linkedin.com/in/realpeterbruce
http://www.metacafe.com/channels/RealPeterBruce/
http://profile.live.com/P.mvc#%21/cid-6c63bca6d91dcfff/details?pa=nam
http://www.myspace.com/realpeterbruce
http://www.netvibes.com/realpeterbruce#General
http://realpeterbruce.newsvine.com/
http://www.orkut.com/Main#Profile?uid=3830619003501350335
http://sphinn.com/user/RealPeterBruce
http://www.squidoo.com/realpeterbruce
http://realpeterbruce.posterous.com
http://qik.com/realpeterbruce
http://readernaut.com/RealPeterBruce/profile/
http://robo.to/RealPeterBruce
http://www.scribd.com/RealPeterBruce
http://myskype.info/realpeterbruce
http://slashdot.org/%7ERealPeterBruce
http://www.plurk.com/RealPeterbruce
http://www.stumbleupon.com/stumbler/RealPeterBruce/
http://www.threadless.com/profile/1713884/RealPeterBruce
http://www.tripadvisor.co.uk/members/RealPeterBruce
http://realpeterbruce.tumblr.com/
http://www.viddler.com/explore/RealPeterBruce
http://vimeo.com/realpeterbruce
http://profile.live.com/P.mvc#%21/cid-6c63bca6d91dcfff/details?pa=nam
http://realpeterbruce.wordpress.com/
http://pulse.yahoo.com/_V6O2RJBA6CWAD4HQSSJO6Y5CLM
http://www.yelp.co.uk/user_details?userid=-hsICSf4OmyMmRSjohYYfQ
http://www.youtube.com/user/RealPeterBruce