This isn't exactly what I believe because I'm always changing my mind, but I kinda think this type of idea sounds interesting. Some bits stollen from elsewhere and other bits mixed with my own original thought...
The universe doesn't really exist, it's all in the mind of god. Well not strictly true, God doesn't have a mind as such; the universe and everything in it including us is all part of God. I don't think there will be anyone greeting us when we "go back" to god, we're more likely to just be absorbed into the collective existance of god, but the essence of our life will have been that we are all as humans much more connected to eachother than we know and all channel different elements of the same god through our lives. You could probably say that whether our life on earth was "heaven" or "hell" was of our own doing because we all choose how to use our life. We exist because there are infinate possibilities within god, and all of these are explored.
What do you think?