.Ruhan Zhao sent me the link for the American Red Cross's dedicated funds donation site for China earthquake relief. I did a quick Web search, and this appears to be the most reliable way for foreign nationals to make a donation.
If, like me, you'd like to contribute to the effort, you can find the site here.
Ruhan also tells me that Cecilia Qin, who was my volunteer translator during my stay in Chengdu, may be sleeping on the sports field with other students while the threat of aftershocks continues. This is a minor inconvenience compared to the misery of those caught by the worst of the quakes. But it really brings home the vast extent of the displacement this disaster has caused.