Updated: 2/28/2013This is the new standard sideboard using data collected from mtgstats.com (http://mtgstats.com)
I sifted through everything to find the 5 more relevant archtypes, and the cards that appear most often in their sideboard. This is raw Magic Online data derived from the Wizards website and filtered through MTGstats. Every day, the latest events are analyzed and decks are automatically assigned to their archetypes. Every month i'll be updating the standard sideboard.
Jund Midrange
{R}{B}{G}
{Abrupt Decay}
{Barter in Blood}
{Deathrite Shaman}
{Duress}
{Grafdigger's Cage}
{Liliana of the Veil}
{Pillar of Flame}
{Rakdos's Return}
{Slaughter Games}
{Underworld Connections}
{Vampire Nighthawk}
Naya Midrange
{W}{G}{R}
{Acidic Slime}
{Bonfire of the Damned}
{Boros Charm}
{Centaur Healer}
{Garruk, Primal Hunter}
{Nevermore}
{Oblivion Ring}
{Pillar of Flame}
{Pithing Needle}
{Ray of Revelation}
{Rest in Peace}
{Rhox Faithmender}
{Rolling Temblor}
{Searing Spear}
{Selesnya Charm}
{Staff of Nin}
{Triumph of Ferocity}
{Zealous Conscripts}
Esper Control
{B}{W}{U}
{Blind Obedience}
{Detention Sphere}
{Devour Flesh}
{Dimir Charm}
{Dispel}
{Dissipate}
{Duress}
{Feeling of Dread}
{Jace, Memory Adept}
{Negate}
{Pithing Needle}
{Psychic Spiral}
{Rest in Peace}
{Supreme Verdict}
{Terminus}
{Witchbane Orb}
American Midrange
{R}{W}{U}
{Blind Obedience}
{Counterflux}
{Detention Sphere}
{Dispel}
{Geist of Saint Traft}
{Jace, Memory Adept}
{Negate}
{Oblivion Ring}
{Pillar of Flame}
{Psychic Spiral}
{Rest in Peace}
{Rolling Temblor}
{Skullcrack}
{Supreme Verdict}
{Tamiyo, the Moon Sage}
{Tormod's Crypt}
Gruul Aggro
{R}{G}
*New archtype*
{Mizzium Mortars}
{Mugging}
{Pillar of Flame}
{Reckless Waif}
{Skullcrack}
{Thragtusk}
{Tormod's Crypt}
{Traitorous Blood}
{Volcanic Strength}
{Zealous Conscripts}
Top 5 sideboard cards:
1. {Pillar of Flame}
2. {Rest in Peace}
3. {Blind Obedience}
3. {Detention Sphere}
3. {Dispel}
3. {Duress}
3. {Jace, Memory Adept}
3. {Negate}
3. {Oblivion Ring}
3. {Pithing Needle}
3. {Rolling Temblor}
3. {Skullcrack}
3. {Supreme Verdict}
3. {Tormod's Crypt}
3. {Zealous Conscripts}
⚫ Link to the old thread by Kaleo42, for the sake of posterity: http://imtgapp.com/forum/index.php/topic,6675.0.html
⚫ Link to November Standard Sideboard (http://imtgapp.com/forum/index.php?topic=14272.0)
⚫ Link to December Standard Sideboard (http://imtgapp.com/forum/index.php?topic=15648.0)
⚫ Link to January Standard Sideboard (http://imtgapp.com/forum/index.php?topic=16617.0)
⚫ Link to February Standard Sideboard (http://imtgapp.com/forum/index.php?topic=17875.0)