Here are some useful links:

Nagarathar Sangam of North America: http://www.achi.org

Malaysian Nagarathar Website: http://www.members.tripod.com/Nagarathar

Bangalore Nagarathar Sangam: http://www.oocities.org/karnatakasangham/virtualgeneration.html

Nerkuppai Nagarathar Sangam, Chennai: http://members.fortunecity.com/nerkuppai

Karthik Travels: http://www.fortunecity.com/millennium/toads/1047/karthiktravel.html

Koviloor Madalayam: http://www.koviloor-madalayam.org

Arimalam: http://members.xoom.com/arimalam

Andha Vikatan: http://www.vikatan.com

Kumudam: http://www.kumudam.com

The Hindu: http://www.the-hindu.com

All India Radio: http://air.kode.net