First time iPad user (I'm a microsoft goldenboy)....purchased 2 days ago...starting to love it. Is that a "power" button on the top of my iPad??? (next to the headphone jack) What is the difference between hitting that button, hitting the button on the face, or letting my iPad power off via time (15 minutes?)? Or is that really a sleep? Is it a good idea to CLOSE apps after I run them? I typically show the apps...(five finger up swipe), then press the icons till they shake with the "minus" sign, then close. How necessary is this? (iPad 2/16Gb/WIFI) Virus protection needed for iPad? Wouldn't think so.... I don't see the point with a "screen protector"...I'm not using a stylus nor putting in my pocket with keys...seems to take away from the beauty and essence of the screen. What are the general feelings about that... (I did just buy the Marware CEO Hybrid, ebay 30 bucks.) As well, I have not purchased a warranty (yet)...shopping around online at "square trade". Seems good, but pricey and I worry about the coverage. I bought mine at Target - they offer a 2 year bumper to bumper (with drop protection) which seems better than AppleCare and SquareTrade...no? Thanks for any replies...look forward to reading them.