for what it's worth, here's one i had posted earlier, but i'm not sure if anyone really gave it a look. it's not really a finished product, but more of a cover concept.
but i see we've got some talented people on this forum when it comes to graphics. i think it'd be cool if they had a contest or something that everyone could submit their work to and maybe pick a couple to be featured as fan art on the inside of the cover or something. probably won't happen, but it'd be a cool way to show the fans some love, since that's what tech likes to do.