Apple has posted their 85-page iPod touch Features Guide online which covers many features and may give some hints as to future iPhone enhancements and capabilities (keyboard language support, etc.) coming via future software update(s).
The Guide covers:
• Getting Started
• Basics
• Music and Video
• Photos
• iTunes Wi-Fi Music Store
• Applications
• Settings
• And more
See the Apple’s iPod touch Features Guide (6.8MB .pdf) here.