I'm now taking my business card design and getting it ready to be turned into my homepage. Pretty much all the things on it will be roll over images/slices that will flip colors or something to catch your attention and tell you "Hey! this isn't a book cover, it's a web page. With buttons!"
So yeah. I really liked aging the book, adding scratches and what not. Except the weird foggy smudgy stuff. That photoshop brush sucks. For the edges I scanned the back of one of my Thor books, which is a Laser Tag guide book ad. I chose it because it's mostly black and that makes it easy to harvest the scratches to overlay onto my cover.