There's an episode of "Married...With Children" where Al goes to "Heaven" and mistakes a dead shoe salesman for God. I think there's a possibility of something like that, where you wouldn't necessarily be able to [b]identify[/i] God, but that's hard for me to picture, if God turned out to be anything like the all-encompassing, awesome presence he's advertised as.
As for entering Heaven still having sins and flaws, that's consistent with the Judaic tradition, but not with Christianity. The concept makes Jesus' being impaled on the cross no more significant than a really bad nailgun accident. That's why Christians can't accept the idea. It's completely incompatible with Christianity of any stripe that I'm aware of.
