Thank you all for the responses, especially Lemming. They've definitely helped see the other side and open up my mind. A lot of the responses make sense, like the ones about rape punishment. Though, there are still a few other issues that still give me pause.
For example, a common point raised is that slavery is okay in the bible, because it was okay in the time period of the bible. God was communicating with people in a way they could accept and understand. What I don't get, is that this is an issue that an omnipotent being has. God is, by definition, omnipotent. Then why can't he work his way around a few communication hurdles? He knows that his word will still be relevant in the future, so why does he only address a certain time period?
Another big reason I'm atheist, and that I neglected to state earlier, is that if the stories of the bible were true, (blood turning into water, the resurrection) these are giant events. Why then, do we have such little historical documentation of these huge events, that supposedly were witnessed by hundreds to thousands of people.
I grant that there is evidence for the resurrection, but such a big claim needs a big amount of evidence to back it up, and we only have a few written accounts from the bible.
Why wouldn't God give us more evidence? That's not rhetorical. If it's so bad to not believe in him, then why didn't he make the truth obvious?