looking to buy an iPad 2. contemplating whether to buy the 3g version (AT&T) or just the wifi version. these are my questions. 1. could i use the mobile hotspot (AT&T) that is coming with iOS 4.3 to let my iPad 2 tether off of my iPhone 4? (I thought that when the initial iPad came out it was not allowed to get a data connection from the iPhone.) 2. would there be any data download speed differences and/or connectivity issues between an iPad 2 tethering off an iPhone 4 (if number 1 is correct above) versus an iPad 2 with 3G built in? (especially while using one on the highway, ie my wife streaming netflix on a car trip) I know the main differences would be obviously the cost of an iPad 2 with 3g built in and the ease of being able to turn on and off the 3G data plan on the iPad 2. Turning off the tethering may be more painful and may not be practical to do on an iPhone 4 from a month to month scenario. thanks for any advice for a first time poster.