From the home screen and several apps, you swipe down from the very top of the screen to reveal it. Some apps that have lots of swiping (like Fruit Ninja) require you to swipe down from the top to reveal a pull-tab. You then grab that tab and pull that down to access the Notification Center. You can also access the Notification Center by swiping down from the lock screen in iOS 7. Lastly, to close the Notification Center, either grab the tab on the bottom and pull it up or press the home button.
iOS 5 is a mobile operating system designed by Apple for iPod Touch, iPhone, and iPad. iOS5 includes new features such as Notification Center, Reminders, Newstand and more. Plug your device into iTunes to update.
iOS 5 isn't out yet. It will be out on October 12, 2011. There are beta developer versions available but you need to be a registered developer to access them.
Yes, Apple iOS 5 is free.
The apple iOS 5 update IS OUT NOW
You cannot. If you buy a new iPod or iPad or iPhone, it comes in iOS 4.3.3 and you have a choice to update to IOS 5 or not.
The apple iOS 5 update IS OUT NOW
Yes you can.
You can update it to iOS 5 the same way you update it to any other iOS version. The 4th generation (and indeed the 3rd generation) iPod Touch can be updated to iOS 5.
iOS 5.1 untethered jailbreak
Yes, when iOS 6 comes out it will be free of charge, just like iOS 5 and iOS 4 were.
Any iPhone, iPod touch, or iPad that is using iOS 5.
Connection to iCloud will be included with iOS 5 when it is released.