Well, I've been surprisingly please with the wireless keyboard and mouse. And there's sometimes when I need to give priority to plain old fashioned books (!) and I can simply move the mouse and keyboard completely out of the way because there's no cable chaining them to my setup
Another good MacBook accessory is Cool Feet: http://www.cableyoyo...olfeethome.html
My wife got these for me for Christmas, and they come in very handy. They suction cup on to the bottom of your laptop and not only allow for better airflow, but tilt the back of your laptop slightly upward so that you can type at an angle. I use these whenever I'm going to be at another location using my laptop for more than twenty minutes--such as a coffeeshop or the kitchen table or wherever.
The coolfeet come with little adhesive disks so that the suction cups on the feet have an ultrasmooth surface, but I've found that on a MacBook, you don't need them. Nor do you need to apply any "moisture" to the suction cups as the directions suggest (I can just imagine people licking them--yuck). The simply go on the bottom of my MacBook with a firm press and pop off just as easily.