No. Not yet at least.
The best calendar software for iOS devices is the Reminder app that comes with the iOS 5 update. My Calendar for Facebook is an app that is useful for the computer. Both of these apps help with reminders.
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
Some new features in iOS 6 include:Facebook integration (along with some Chinese social networks)shared photo streamsnew share menus with buttons that look like appsbetter Siri features such as Tweeting with SiriFacebook posting with SiriSports, Movies, and Reservations with SiriPassbookREMOVAL OF YOUTUBE APP
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
Any iPhone, iPod touch, or iPad that is using iOS 5.
Connection to iCloud will be included with iOS 5 when it is released.
The iPhone 5 will run iOS 6 or iOS 7.