(http://i48.tinypic.com/333ydk9.jpg) (http://manuals.info.apple.com/en_US/iPhone_iOS4_User_Guide.pdf)
Apple posted the iOS 4 User Guide (http://manuals.info.apple.com/en_US/iPhone_iOS4_User_Guide.pdf) today. It is a 244 pages guide providing iOS 4 instructions for iPhone 4 and iPhone 3GS devices.
The guide consists of 28 chapters:
Chapter 1: iPhone at a Glance
Chapter 2: Getting Started
Chapter 3: Basics
(http://i47.tinypic.com/2nkhws9.jpg)
Chapter 4: Syncing and File Sharing
Chapter 5: Phone
Chapter 6: Mail
Chapter 7: Safari
Chapter 8: iPod
Chapter 9: Messages
Chapter 10: Calendar
Chapter 11: Photos
Chapter 12: Camera
Chapter 13: YouTube
Chapter 14: Stocks
Chapter 15: Maps
Chapter 16: Weather
Chapter 17: Voice Memos
Chapter 18: Notes
Chapter 19: Clock
Chapter 20: Calculator
Chapter 21: Settings
Chapter 22: iTunes Store
Chapter 23: App Store
Chapter 24: Compass
Chapter 25: Contacts
Chapter 26: Nike + iPod
Chapter 27: iBooks
Chapter 28: Accessibility
At the end the guide provides an Appendix with the following information: Support and Other Information, Apple iPhone Support Site, Restarting and Resetting iPhone, Backing Up iPhone, Updating and Restoring iPhone Software, Safety, Software, and Service Information, Using iPhone in an Enterprise Environment, Using iPhone with Other Carriers, Disposal and Recycling Information, Apple and the Environment and iPhone Operating Temperature.
The guide is available in PDF (http://manuals.info.apple.com/en_US/iPhone_iOS4_User_Guide.pdf) format as well as in an iPhone formatted version.