I use my iPad daily, often in the morning and again in he evening.
When it comes to input on other than full keyboards, I have become a devotee of Swype, and no longer having to type with two thumbs. You drag your finger across the letters that you want, and the software guesses the word you want from your path, where you pause, and where you turn.
I was intrigued by Swype, but waited until I was in line for twenty minutes and turned it on and experimented. Twenty minutes later I was sending texts almost as fast as teens, and amazed at it's ability to guess correctly ~85% of the time.
Still no replacement for a full keyboard, but it does make me wonder about a 10 inch tablet with a Swype interface teamed with LMI ignition.