Apple’s usually so very careful about updating its site, generally taking it down when they introduce a new product.  But the Swiss version of the Apple Store appears to have accidentally leaked information about an update to the Airport Express which adds 802.11n support.We had heard reliable reports that Apple will be launching a new version of their Airport Express next week, likely on Tuesday. Apple Retail stores should have stock of the new Airport Express by mid week. The new model will be priced