Hey, if you liked my Top Ten Astronomy Pictures of 2007, you'll love the Planetary Society's Year in Pictures calendar. I see several pictures on it I wanted to use for my list, but couldn't or didn't for various reasons. But it looks very, very pretty.
Fraser at Universe Today is also offering a Year in Space calendar; a 144 page weekly calendar with all kinds of info about astronomy and space.
Why choose? Just buy both!