Apple released new firmware version 2.2. Here ^[1] are the direct links to all firmwares, including 2.2.

What's new in 2.2:

• Enhancements to Maps
  • Google Street View ^[2] - takes you on a virtual walking tour: Navigate street-level photographs of places you've located in Maps.
  • Public transit and walking directions - Get walking directions, find public transit schedules, check fares, and estimate your travel time.
  • Display address of dropped pins
  • Share location via email - Tap the Share Location button to send an email that includes a Google Maps URL.

• Decrease in call setup failures and dropped calls

• Enhancements to Mail
  • Resolved isolated issues with scheduled fetching of email
  • Improved formatting of wide HTML email

• Podcasts are now available for download in iTunes application (over Wi-Fi and cellular network) - Get access to millions of free podcasts on the iTunes Store via Wi-Fi or your cellular network.

• Improved stability and performance of Safari ^[3] - A new search-friendly user interface, better performance, and more stability make Safari even easier to use.
• Improved sound quality of Visual Voicemail messages
• Pressing Home button from any Home screen displays the first Home screen - Take a shortcut from any Home screen back to your first Home screen by pressing the Home button.
• Preference to turn on/off auto-correction ^[2] in Keyboard Settings