I want to help with a donation. But, I want to be sure that the money gets to those who need it.
The Russian Embassy has the link on their site:
http://www.russianembassy.org/
This foundation was originally started to help the victims of the theatre atrocity. Read about it here: http://www.moscowhelp.org/faq.htm
And here's the link to the people behind it (mostly USA):
http://www.moscowhelp.org/board.htm