Theres also the Smallville cop who saw Superman at the Kent farm when he brought Lois there. Of course like many people in Smallville he'll probably keep it a secret. In reality theres no way Superman could hide his identity, the US government would launch the largest manhunt the world has ever seen to find who he really was and they wouldnt stop looking until they found him. They would do much more then use a single spy satellite. But of course this is fiction and you have to suspend your disbelief. In the next movie they'll probably have a brief scene of him struggling to conceal his identity and thats it.