Where is Heaven, if there is one?
I actually think heaven will be on Earth in a more corporeal version than we might expect.
Is there a Hell?
I have heard a lot either way. There is seemingly unmistakable rhetoric in the Bible saying things like 'lake of fire' etc. but, on the other hand the actual Hebrew word for hell is the name of a place outside of Jerusalem where the Jews burnt their trash. Is it a metaphor? Who knows, I sure don't. The way I look at it, I'll be spending more time in heaven than the alternative so it doesn't matter much.
Does some type of god rate a mention anywhere?
By all means, just don't go looking for physical evidence to prove his existance.
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"Science without religion is lame; religion without science is blind." - Albert Einstein