Links...

Exchange Rates & Currency Calculator
http://www.x-rates.com/

United States Embassy in Mexico
http://www.usembassy-mexico.gov/emenu.html

Practical Information for Tourists provided by the National Immigration Institute
http://www.inami.gob.mx/pagina_ingles/principal-ingles.asp

Secretaria de Gobernación - INM
"Bienvenido Paisano"
http://www.paisano.gob.mx

U.S. Department of State
Consular information sheet on Mexico
http://travel.state.gov/travel/cis_pa_tw/cis/cis_970.html

Buy Mexico Auto Insurance
http://www.drivingtomexico.com

Transportation Security Administration (TSA)
http://www.tsa.dhs.gov