I know some people don't think hosting a website on S3 is a good idea. I'm going with it as it allows me to iterate my website faster. Since I'm trying use ELB to load balance, I have an AMI with my API code on it. If the website were on the AMI, then I'd have to spend time creating a new AMI when the website changes. That takes way more time then pushing the code to an S3 bucket.
My only issue with the S3 hosting is figuring out how to get the googlebot to crawl my website.