Yes, of course.
Please email us on firstname.lastname@example.org (from the email you want us to delete) and we can do it for you. We're always concerned when somebody asks us to delete an account, so we'd greatly appreciate if you could give us a reason about why you chose to delete the account.
(Please make it something a little more detailed than "Delete my account because I don't want it any more.")
Note that all your data will be lost if your account is deleted.