Related: American Red Cross information page, including donation link
Update 11.05: More from the CS Monitor, which also provides a partial list of (US-based) organizations accepting donations to assist victims of flooding in Tabasco:
Red Cross: Call 800-HELP-NOWor 800-257-7575 (Spanish). www.redcross.org
Catholic Relief Services: 877-HELP-CRS or www.crs.org
UNICEF: 800-4-UNICEF or www.unicefusa.org
World Vision: 888-56-CHILD or www.worldvision.org
Operation USA: 800-678-7255 or www.opusa.org
Commercial banks with relief-fund accounts set up by the Mexican government:
Wells Fargo bank
Account name: Ayuda Tabasco 2007.
Account number: 2280300127
Update 2: Al Jazeera English – Mexicans take flood rescue into their own hands:
Update 3 11.06: $500,000. US. That’s like, what, a half hour in Iraq?