Apple released new firmware version 2.2. Here are the direct links to all firmwares, including 2.2.
What's new in 2.2:
Enhancements to Maps
Google Street View - 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 - 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.