I have my MBP in a clear Speck Shell...then I slip it into one of these nifty cheap sleeves I got off of Ebay...
http://http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rt=nc&nma=true&item=250725480210&si=O8CYv6zT%252FttEZl84uXVssJKZiI0%253D&viewitem=&sspagename=STRK%3AMEWNX%3AIT
I also keep a Moshi guard between the keyboard and the screen when closed.
Ended up getting the Moshi keyboard cover, as well. I had never had one because I thought it would reduce the tactile feel when typing on the keyboard, but this thing is amazing. I forgot it was on there.
I have a wrapsol on the top and bottom lid of my 13" macbook pro, a Moshi palmguard, iskin clear keyboard cover, and a speck satin case. I also use a speck tough pack sleeve that i slip the macbook into when traveling. All of this goes into a Northface backpack.I know it seems like overkill but i love to protect my things.