There are many, many iPad keyboard covers and cases. In fact, I’m testing one right now. The best keyboard cover I’ve ever used can be had very cheaply right now.
Logitechshop has the white variant of the Logitech Ultrathin iPad Keyboard Cover for a very tasty $59. I reviewed it a while back for TechLife magazine, and it beat out the competition by quite a wide margin, gaining my recommendation — and that was at a $99 price point. At $59, it’s excellent value if you’re after a keyboard/case solution for your iPad.