If you are looking for a site that will be a resource for you in Bible study preparation, I recommend this site. It's chock full of great information.
One word of caution though, as I'm learning this lesson myself...don't get so wrapped up the the theological discussions that you miss Jesus and the gospel.
Head knowledge is useless without the penetration of the heart, and the fruit that comes from a changed life through Jesus.
Here's the link: http://www.preceptaustin.org