Apple is now offering people the ability to donate directly to the American Red Cross in order to help support the Philippine typhoon disaster relief. The donations are being advertised on Apple's homepage and in iTunes. iTunes users can donate and increments of $5, $10, $25, $50, $100, and $200 in the US iTunes store. Check your local iTunes store for currency amounts there.
100% of every donation will go to the American Red Cross. Apple does note that because it does not share iTunes user data with anyone, people who donate will not get an acknowledgment from the American Red Cross but they will receive an iTunes receipt noting their contribution.