Well, I get the feeling Hamas are recieving much more 'external' support than Fatah because of their more openly hardline views. My main cause for hope, oddly enough, is the fact that even Middle Eastern sources are reporting strong support for the referendum, and dropping popularity of Hamas for standing aginst it.
It's going to get worse before it gets better, I know that, the odds of Hamas turning round and saying 'Oh, ok, the people have spoken, we won't attack Israel any more' are small to say the very least, but I think the overall trend is hopeful, at least it means in the public there is a growing consensus, that might just be the first small steps in starting to sort this mess out. How much good this will do with militant Hamas groups running round destroying their own peoples' property and services I don't know.