If you want to help in response to the disaster in Kenya, I have already mentioned praying.
You can also give. The International Committee of the Red Cross can connect your gift directly to the Kenyan Red Cross, who are doing a lot of efforts to help those hit by the strife there. Here's the donation link and a page telling how they are helping.
Peter Kioko is a good friend of ours who works for the Kenyan Red Cross. He has been really busy of late!
Update: another place to give is via The International Mission Board (SBC). They have a fund for Human Needs Ministries, here. Please designate your gift for Kenya disaster relief. (Thanks to Bob for that giving possibility.)