The church Bible study page has added a link to notes on the Book of Revelation. This site (created and owned by a church member) has almost a verse-by-verse explanation of the book of Revelation. The church member is always updating and adding and changing information as necessary.
It is a great study tool, especially if you hit a verse or portion of the book of Revelation that just doesn't make sense to you or if you're having some trouble with the symbolism. You can go to that site and see what it says. Check it out here (scroll down on the page to find the Revelation link).
Here is a free online commentary for the book of Revelation done by the Amazing Discoveries ministry, that can be found here.
Hope this helps in your personal study of the book of Revelation.