Columnists

• Mona El Tahawy (@monaeltahawy), Egyptian writer

Citizen journalists

• Sohaib Athar (@ReallyVirtual), Osama bin Laden raid
• Stefanie Gordon (@stefmara), space shuttle photograph
• Keith Urbahn (@keithurbahn), chief of staff to former Defense Secretary Donald Rumsfeld

News subjects

• Joyce Grendel (@joycee_emily), prom date
• Chris Newton (@NewtyIce), autograph seeker
• Lauren Lane (@laurenlane1984), bride
• AnnMarie Walsh (@padschicago), homeless tweeter
• Leigh Fazzina (@LeighFazzina), triathlon competitor
• Melissa Skabich (@mommyblogger76), mommy tweeter
• Daniel Morales (@putodanny), homeless tweeter

Twitter parodies

• Josh Simpson (@MrJoshSimpons), creator of @BPGlobalPR