Today I decided to prune may My Social Networks bookmarks folder, getting rid of links to my accounts and profiles on those services that have closed. There were many.

When I mentioned my activity on Twitter (@iamPariah, by the way), @Kathy_Writer suggested I list all the closed services I find, er, not find, so that others can be aware of the closures. Good idea, Kathy. Although I deleted the bookmarks for a few before I began listing around the Ms, here are those I was able to list.

All of the following social media services have shut down on or before this post’s date.

• BriteKite
• CoComment
• Mixx
• myYearBook (now MeetMe, a dating site)
• Odeo
• Ping.fm (still up for the moment, Seesmic shutting it down “soon”)
• PlugIM
• Popego
• PostRank
• Profilactic
• Retaggr
• Seachles
• Simpy
• Sleevenotez
• SocialThing (now AOL’s Lifestream)
• Sphinn
• Streamy
• Tagfoot
• Threadsy
• Toluu
• Tweeples
• TweetMixx
• Twhois
• Twine
• Twitterless
• Unhub
• VIRB
• VisualProgression
• Vox
• Wakoopa
• Wallowr
• Meme by Yahoo
• Yonkly
• YouAre
• YouBundle
• TwitReferral
• Score.ly
• Subjot
• ShowYouLikeIt

These are just those networks to which I had belonged (or at least once tried). If you know of others, please add them in the comments.