Does anyone know how the Ipad with 3g will work? My question is: Will it automatically default to Wi Fi, even if there are 3g signals present and will you be able to look at your Ipad and easily see what you are connected to? Will there be an option to turn off 3g unless you need it?

I would imagine it will work the same way the iPhone does. I believe if WiFi is available, it will use it for data connectivity by default and switch 3G when it can't find or can't connect to WiFi. If it can't find 3G either, it will switch to Edge.