Google page on Donations for Haiti : http://www.google.com/relief/haitiearthquake/

Google is maintaining a page for donations to Haiti.  You can donate vi Google Checkout.  Google will also donate $1 million to Haiti to relief organizations. Google is maintaining updated Google Earth views of Haiti as well as offering free Google Voice calls to help US Families reach Haiti.
You can also give "micro donations" via your cell phones for certain organizations:
 "The following organizations are accepting SMS donations in the US only:

• SMS text “HAITI” to 90999 to donate $10 to Red Cross relief efforts
• SMS text “YELE” to 501501 to Donate $5 to Yele Haiti’s Earthquake Relief efforts
• SMS text "GIVE10" to 20222 to donate $10 to Direct Relief"