Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_2_1 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8C148 Safari/6533.18.5) Us anyone using one of those silicone keyboard covers on their MBA? I'm thinking about getting one for two reasons. #1 o keep the keyboard clean and #2 to prevent the marks on the screen. Let me know!!