I've only has my iPad2 a few weeks but here are a couple of things I have found our recently:
To scroll instantly from the bottom of a long page (perfect for mumsnet) touch the black bar at the top of the screen that has the time/wifi signal/battery life on it
Hold the !, key down on the keyboard for a second to get an apostrophe.
To lock your screen (for when you are mumsnetting in bed - as if I would). Press the home key quickly twice then slide the bar over so you can see the far left end and there is a lock button there (thanks lovely friend who told me that!)
Apps: someone on here mentioned dropbox which is great for moving stuff around between laptop/iPad/iPhone
Also THIS is a straight forward guide to loading DVDs onto your iPad.
Anybody else like to share their finds? Can you tell it's still the best toy EVER!!!!