Not with respect to Mr. Arar, Mr. Almalki, Mr. Nureddin and Mr. Abou-Elmaati, no, but Mr. Abousfian Abdelrazik's case has recently come to light.
For individuals in this situation, it is very difficult for them to publicly argue their rights. Mr. Almalki, Mr. Nureddin and Mr. Abou-Elmaati waited some time before doing so. So it's not at all impossible that someone will go public with other skeletons in other closets at some particular point, but I can't predict this.