Seeing as I'm not Chirstian and do not believe in Creationism, I'd like to throw my two pence out there...
Is it possible that there is a god but rather than have an appearance, he or she is merely an entity like, for lack of a better example, the Force from Star Wars.
This god therefore could have created many species to live on his/her earth and due to being best suited to Earth, humans have evolved to be the most advanced of all the species.
I know this makes god 'faceless' as it were, but because of my Hindu upbrining I am inclined to believe that all living creatues have a soul. Therefore all species can pass into Heavan or they can be continously reincarnated until they lead a life good enough to be deemed 'Heavan Worthy'.