Suicide Machine has stopped Facebook suicide after a cease & desist letter sent to them from Facebook. So the only way to close your account is by the official way.
Its just sad but understandable why FB have blocked the site. But IMO, people should have the right to choose for such services, if so they want to.
After all, Suicide Machine wasn't doing anything malicious. Just helping people getting off the net a little bit easier.
Also, just deleting your account doesn't guarantee that all the information has been pulled off the Internet. Deleting each and every posts manually, is the only way to be "a little sure" that our existence is completely wiped digitally.
And Suicide Machine was just helping people to do the same thing, but faster.
I don't know why, but I don't think FB has a great future, if it chooses to take sides with the dark force.