Finally. Facebook have just unleashed the ability to not just delete your comments, but edit them. I don't see how it took them all these years, but the ability seems to be available to some, and not all at the moment. On my account, I can now edit and delete comments.
One of the best things about this new ability is that Facebook will show the full edit history for a comment, so that everyone who takes a look at the conversation, you'll get the full context. Not just the edited bits to make someone look good in an argument, or whinge session.
As you can see from my above picture, the ability is there. Don't worry about the conversation, my local retailer are having a buy-one-get-the-second-item-half-price sale, which is pretty damn amazing, and I really want a new TV. There's no ability to edit the post itself, just a 'delete' option which is quite lame considering the new 'edit' ability is live for some.