Idiot's Guide to God's Existence: Over 500 proofs for God (humor!)
I hope this isn't a re-up. I was just given a link to this awesome web page with all of the possible arguments for God broken down into their basic formulas.
You know what they say: It's funnier when it's true:
A place common to all will be maintained by none. A religion common to all is perhaps not much different.