Personally, I have recently thought about the Genesis account as more of a symbolic story, for the Jews.
Many religions have some sort of story of creation and explanation about why there is wickedness in the world. There is a theory that says that if we did evolve, then as our brains became larger and more capable of abstract thought, we *needed* to form these stories regarding why things are as they are. Im not saying that this is the whole answer, just that its a consideration in the whole debate.
Some people I know who do believe the bible, seem to look at the genesis account as largely symbolic of "mans gradual alienation from God". Some say maybe the story serves to show how the groups of people on earth gradually became more independent of him.
Lets face it, the Jews were waiting for a saviour. Why? Because they thought that the reason for all of this pain and suffering was MANS fault, not GODS. So mankind needed a saviour. The whole Genesis account supports this idea that we need a saviour. How else would you prove that?
Some faiths teach that this good and bad scenario is what was intended all along. The old argument - if we never experienced "bad", how would we know what "good" was? Things in this world exist in polarity - each extreme complimenting the other. Light / Dark, Day/ Night, Good / Bad, Hot / Cold. Mankind has developed this way of looking at the world. It is argued that mankind invented the PURE LOVING GOD and the EVIL HATEFUL SATAN.
Im inclined to agree that there is no God who is 100% pure and loving. The whole "did he know" or "didnt he know" argument pales into insignificance if you accept that maybe the God portrayed in the bible is just mans idea of god or how god should be.
Sirona