The Red Cross of Canada accepts online donations (Visa or Mastercard) here. Cash (credit card) donations are the best way to help during a crisis like the earthquake/tsunami situation in Asia. It puts resources in the hands of relief workers right away, with little or no delay.
The coastline areas affected by the tsunami are devastated, but things are unaffected just a kilometer or two inland, so it is possible to get food and water to the survivors quickly, and to provide shelter away from the devastation. But they need money. Now.
Update: since I posted this, the Red Cross site has become very slow to load — which is probably a good sign. You can phone the Red Cross at
1-800-418-1111, or you can try Unicef’s donation page.