I have been coming to this coffeeshop where they have quite a weak wireless signal. My MBA picks it up sometimes, but often not. Sometimes I'm able to work online, often not. Other visitors with PC's and macs connect OK and are able to work online much better. Other situation: At home many neighbors have wireless networks. If I scan with my Air I see about 5 networks. My old Asus 15inch XP laptop finds about 10. How do you rate your wireless reception on your MBA?