From the PC(USA) homepage:
In the wake of a 7.0-magnitude earthquake in Haiti, the Presbyterian Church (U.S.A.) is responding through Presbyterian Disaster Assistance and its partners. Presbyterian World Mission is gathering information on the safety and status of our mission personnel and ecumenical partners in the area. For updates on the earthquake and the church’s response, please visit PDA. Initial reports indicate a large number of casualties and widespread damage especially in the capital city of Port-au-Prince.
You, too, can be part of God’s answer to prayer for those affected by this disaster. Information on the situation and prayers and worship resources are available through Presbyterian Disaster Assistance. Funds from One Great Hour of Sharing are already helping with the initial response. You can give to the ongoing relief through PDA account number DR000064.