Sherlockian.net has a list of Sherlock Holmes tumblr accounts - let us know who should be added to it….
advicesherlockaguidetodeductionalistaird-221basherlockworldbakerstreetbabesbakerstreetblogbakerstreetinthetardisbbcsherlockftwbbcsherlockgifsbelieveinsherlockblandsherlockianfantasiesbrothermycroftblu-sherlockcanadiansherlockianscanonfodderfridaycharlottes-sherlockianjournalcheeselockconsulting-detective-on-the-runconsultorsherlockholmescumberbatchattackcumberbatchwebcumbercougarscumberqueendamnsherlockwhathappeneddiaryofajohnlockiandoctorjohnlockdontasksherlockdoylkiendreamerofbakersteva-christinefinalproblemfindingsherlockflowersforsherlockfuckyeahbbcsherlockfuckyeahdoctormerlinsherlockfuckyeahgranadaholmesfuckyeahsherlockfuckyeahsherlockficsfybakerstreetfyeahsherlockfyeahsherlockandjohnghostbeesheartireneadlerheli0centrichell-yeah-sebastian-moranhellyes-all-holmeshipstersherlockholmesosishome-is-where-the-holmes-ishustlinholmesibelieveinmycroftim-sherlockedirregular221bits-an-ear-hat-johnlokis-army-at-221bj-moriartyjamesmariartyjennysherlockedjfransherlockedjohnwatsonismyspiritanimalladylegolasmartinfreemansfacemxpublishingmyboswellmykingdomforacumberbatchperlockholmespotterwholockianrogerjohnsonsreviewsRPersofthesherlockfandoms-holmessexlocksexuallyoblivioussherlockshaddictedsherlock-desherlock-quotessherlock-thegamesherlockah0liquesherlockcanadasherlockcountdownsherlockcraftsherlockdcsherlockdictsherlocked-inside-the-tardissherlockfanficsherlockfanficrecssherlockholmesfanartsherlockholmesiansherlockholmesmotivatorssherlockholmesthemusicalsherlockh0rnyholmessherlockian-book-reviewssherlockismyholmesboysherlockisonthecasesherlockmexicoandcosherlocknycsherlockologysherlockpornssherlocksblanketsherlockseesthrougheverythingsherlocksexualfrustrationblogsherlockspaddedroomsherlockspearesherlockxjohnrecssibiholmessirarthurconandoiliessteamysherlocksmutsuperwholockfeelstardisherlocktea-at-221bteaparty-at-221bteddythemongooseteenagedirregulartextsfrombakerstreetthecutteraliciatheholmespagesthenightsofthedeal-toppedtablethenorwoodbuilderthesherlockfandomthesonicofdeductionthingsasherlockianshoulddotookmyskulltravellingdetectiveukdrwatsonundershawpreservationtrustunposted-letters-to-sherlockutterlysherlockedwassup-holmeswearsherlockwholockwhosthatcumberbatchguywminsherlockyouseebutdontobserve
gosh this list is appallingly short considering how many Sherlock tumblrs there are out there.