I'm glad I read your post before I commented,because I was about to say something similar. Whenever someone dies under mysterious circumstances,one of the first questions raised is "who benefits from this death"? I think Suha made out allright and she did spend a lot of time alone with him before he passed.
Saudi-led coalition air strike kills around 30 Yemeni civilians (Reuters)
from the article: Arafat aide calls on Chirac to reveal truth about Arafat's death