The most posters in one day was 538, 05-07-2009.
$Bigtymer$, $occa_BaLLiN, *VA*STORY, 2cool4ya, 3701899, 8>>>24, ?¿?uestion, Afrodon, ak472002, Aku, ALion_In_The_Winter, alonzoharris, amigo, angel434343, ankhenaten2, Anubis28, arcane002, areynolds23, ATLDON, autobotmirage, B010, b1nArY, bad companyuk10, Benny Lava, BESTOFTHISYEAR, beyster, Big Steve, BIG WATTS, Bigakathebeast, bigbad, biggveiny, bigman341, bigtone, bigwilld, black, BlackBearWolph, blackbull1970, BlackCaesar, BlackFruitPunch, blackmajic83, BlackMartini, blackwarrior, Blitzwing, blknight14, Block Burna, bmaster1991, board, boneman8_2000, bootney farnsworth, booty_visionary, Breaking Atoms, brickcityhustla, Bridgep0rt, broman5thflo, BROTHAFROMANOTHAPLANET, Bullet, bulls, butta_cream, Captain Save the doe, carlcat, Carlito, Cassius, cdp66, cdub123, cdub_382, Ch0zen 1, ChillPill, chillz, CHITOWNSLICKSTER, chop_32, chuck67, cirpoxr, clickums, codfish, comfortu, complexbrother, creekwater, Crenshaw60, Croft2006, cucci_slamr, curi8ous, cwalk, D.J.BUTCHERKNIFEKILLER, D.R.E., da prodigy, Da Truth, daCableGuy, daknucklegameisill, dam, Darkman022, DaTruth, dcman100, DCMC, deimoz, DeRonJuan, dex, dh86, diducthat913, dimensionx_the_2nd, dirrtyredd89, DirtNation, dirtybone74, DR.Bombay, dre206, DrewMad, Drunken_Monk, DSCHULTZ, d_android, earlson411948, eastldn, easy-mac, edawg, Educated Fool, el cabrito, eljae, empath22, entesq, Enzo Tha Great, evil_twin, fabric86, FalconFanMan32, Father Oceania, fatherDIXON, faultless, fido, FinlandRulez, Flange, flawlessjewels, Fo Shizzle My Nizzle, foreel, fredfunk, Freebase_88, Fresh2def, G-Sword, garcia vega, genonfire, getmike, gettinit, ghrnvf, gman6319, Grael4, Graver, GretoVerno, Grunt, gun show, HaileBless, hakeem, halocode, Hammurabi, harlemfsu, harlemruldaworld113, hatetoluvme, hellboy2007, hoodgyno, hothammer57, hotrod, huggi007, hugrad95, Iceberg, icecreaman, ikon, illogistics, ILS, incognegro76, Insane|Game, Itetsuke, j.roc, jackDaniels, JackoMcMasto, james evans, jasmc5000, jaspa, jaybone313, jaygreenie, JDB-Artist, JdotRperiod, jerry6d, Jigg City, JKWIK, jojodancer, jonniecage, Joseph stewart, JRela2000, jroc0007, jtight5, jukem, juls, JuNiTo, jw3, k-sizzle35, kccole, kemetman, kevinidonia, kevkno, kevshine, keysersoze, KiD FiReBaLL, KillaDilla, kingdeejay, KINGGARGON, kiros34, KittyKattpurrr69, knifes edge 32, knocka, kuyo, L'il Quest, larry, LAtimes, Laze, LEE County ALL-STAR, lemur, lexxxluther, light1443, lilrobxl, link1227, London Dappa Dan, LOTTO, lsams48, LSNAKE, M Reezy, marcus07hs, markvincent, Marz, mathematik, mcbro, mentality, Mephisto, Michael Angelo, midsize_poppa, mikejz88, Miss_Toni, Mista, MONEYYG, Monsta, Moreno Hill, mrt330, MrWest432, muker, mutt face, N.J.allday, NA PLAYA, nasirjones, NastyNate88, Native Son Native Tongue, NcRider, Neo Solitude, Neoness, Nicademo, none22, Ohnezone, OLKRARY, OnkelX, outstanding, ownliwon, oxen1, passat25, pcw, peeper, peepgame9, pettyium117, philly95, Phoenix, pimpsuit, Pinero, pistol, Pitbulldell, Playboy, pobrokeazz, poiupoiu, POKEDADDY, Polo, pookie, pre2006Bitcch, primofan, professoreagle, puqo, PvMarchingStorm05, R=G, RamsesVIII, Rawww, raylewisknife, razakdigital, REALITY, RedDevil, reekdogg48, REL, REVENGE, ReznoR, righteousnova, ripper77, River, roberthavok, roby_photo, Rocstdy, RODAN, Rotten, rushmore, rworm42, SAINT, saiyanknight87, salisman2, Saundman, SCFWORK, scheme00, schillah, sedric1, SeemLess, sennie zee, shad25, ShadyGrady, shattastar, Shawtyman, shiesta, sidqallah, SignalSoldier, Simian Drugs, simsanders, SinatraStyle, sinia, sky, slickback, slickjc, Snapshot, Solon, somerandomsht, soopaman, soromonu, Soundwave, starscream, starzkyeno, stealwill, StillInLuvWitMyDoe, Stryfe, Super Mouse, surenoX3, Suujaaisme, SYCNikka, S_EX, tadjani, take_notice, TayMan, TBA, Terran, th3watch3r, that brooklyn nig, THE ASSASSIN, The Dark Knight, theCUTman, TheGreatJayDubb, TheJiggyJigga, theonlytopconqueror, TherealMonkeydog, The_Guillotine, Thumper213, TipX, Titybouy10, tmonster, tommy2gunz, tommygunzz, Tony Sinclair, TonyRoam64, toto, tragedy812, Travis69, trillfam82, troybliss, Truth, tslane1, tsmooth, tteee69, tupacandp, turbo_b6, Ty The Great, Tyson, Ulysees1, Uncle-Face, unkfart, UnKnown1, urbanxxx, Urban_Knight, valmont, Vegeta 06, verbalpen, Verbal_Vett, vizier, Wally Soprano, werdgawd, WestPhillyReese, Xero Kaiser, xspeights, yarkamarka, yeezy, yunhov, zedi, zek, Zerox2007, Zevin64, zihed

The most registrations in one day was 12, 01-20-2009.
bigfatblunts(L)

abevans73 (36), StreetStylez_DVD (35), Thinking (31), nohbahdii (29), killacash (25), SYCNikka (25)