Heres a few of the features that Apple didnt get around to mentioning during their Keynote. You can see all these listed on the slide below at the conclusion of the iOS 5 segment of the show. Which features are you looking forward to?
Hourly weather forecasts
Personal dictionary
Multitasking gestures
Emoji emoticons
Typing shortcuts
Wirelessly sync exchange tasks
Built-in Dictionary
FaceTime mid-call invitation alerts
Improved FaceTime video quality
Weather for your current location
Mass Configuration
VoiceOver action support
Real-time stock quotes
Wi-Fi sync to iTunes
Custom Vibration Patterns
Accessible input for mobility
LED Flash on incoming calls and alerts
Option to speak text selection
VoiceOver item chooser
Mail improved offline support
Set tones for voicemail, mail, and calender alerts
Smart Playlist sync for iTunes
iTunes Tone Store
Swipe to delete songs and playlists

Hourly weather forecasts
Personal dictionary
Multitasking gestures
Emoji emoticons
Typing shortcuts
Wirelessly sync exchange tasks
Built-in Dictionary
FaceTime mid-call invitation alerts
Improved FaceTime video quality
Weather for your current location
Mass Configuration
VoiceOver action support
Real-time stock quotes
Wi-Fi sync to iTunes
Custom Vibration Patterns
Accessible input for mobility
LED Flash on incoming calls and alerts
Option to speak text selection
VoiceOver item chooser
Mail improved offline support
Set tones for voicemail, mail, and calender alerts
Smart Playlist sync for iTunes
iTunes Tone Store
Swipe to delete songs and playlists