MercyCorps & AmeriCares collecting aid
Americares (about) is also raising money and coordinating with local groups to send supplies of medicine to send from Amsterdam. They haven't yet specified an Earthquake-specific fund on their donation page, but you could specify that that's what you want your donation used for in the comments.
MercyCorps reports 92% use-of-funds efficiency, and AmeriCares has received the highest 4-star rating from Charity navigator. MercyCorps six-months-out post-Tsunami progress report is here. AmeriCares press release about its Tsunami fund is here.