An important note is that I use the term "borders" metaphorically; an object finite in any respect will end in some respect. We are not only discussing spatial or temporal finiteness, a point which several respondents have failed to grasp. And yes, while the definition of the infinite I must use for the purposes of this discussion may not be one of the more common definitions, it's still a valid one, and I've gone to pains to make it as clear as possible what I mean in my use of the term.
As for your final point, I'm unaware of any major branch of Christianity that would be content with what you pose: that God is finite, meaning that He merely adheres within reality, meaning that while He may appear godlike from our perspective, He is not the creator of Reality, merely one of its inhabitants.
Liquid, if you are genuinely interested in approaching my thesis, as it is, in this thread, I'll happily do what I can to try to further elucidate. As it stands, you'll pardon me if I can only believe that you're grasping for grounds, semantic or otherwise, to dismiss it.