1. Not as far as I know
2. Settings ->Language & keyboard ->User dictionary - Also the device keyboard menu under language & keyboard will let you turn off the auto-text and auto replace
3. click and hold (long press) you can then drag the widget to the bottom of your screen (portrait). You'll notice the menu button turns into a trashcan. Move it there and it will remove it from the screen. Long press on the home screen and select widgets to add them.