I think there's a very good chance that life exists on other planets, especially if we're only considering unicellar organisms and very simple ecosystems. Maybe even sentient and technologically advanced life.
I seriously doubt that Earth is being buzzed by ETs in their saucers (or triangles). I agree with many of the hurdles listed off by skeptic2. They decrease the likelihood of alien visitors. The Roswell non-incident proves nothing and those videos from Mexico are questionable.
As for the separate question on "god": I'll say that a "creator god" definitely exists. Only its not the personal god of the bible, or quran. Its "God - the process" - all the unfolding interactions and chains of events by which things have come into being. With biological evolution being one aspect of this metaphorical god.
As to the kind of loving personal God many Christians believe Jesus talked about (or even was), I'd love unquestionable confirmation. I'm moved irrationally to hope that such a God is around. But I look at so many incongruities that speak more for the absence of such a God, and have to conclude that I just don't know.