CS is the rebranding of the Professional products. Adobe is not using a number system anymore, but Photoshop CS is what might have been Photoshop 8. Elements is a separate product and not part of the Creative Suite family.
Although a bunch of Adobe upraded programs has just been released, Elements wasn’t one of them. It may be a bit before that happens. They don’t all come at once and normally not this many are released at once.