There are not many companies that do true delete. My understanding is that you can go through Facebook for individual items and delete. But the question is whether they are truly deleted or not in backup of backup of backup. They say they are for most purposes. But you have to go item by item; you can't delete a whole profile easily. I don't know of any websites that do a good job of that at the moment, but I can't claim to know of them all.
On October 18th, 2012. See this statement in context.