Developer of popular TinyUmbrella tool is working on a new utility allowing users to customize Apple iOS Firmware .IPSW files, according to the tweet by the developer the new utility TinyPwn will make is possible for users to make scriptable modification of the ipsw firmware files via a simple custom API on Windows, Mac and Linux.

As rumored earlier iPhone Firmware 2.2 is now available for download via iTunes to general users, apart from several new features and performance improvements the new update fixes critical security vulnerabilities and is being labeled as a "essential update" by Apple.

The new firmware update brings the following new features:

• Google Street View with public transit and walking directions with handy option to share location via email.
• Mail improvements like better formatting of wide HTML email with resolved issues with scheduled fetching of emails.
• Availability of millions of free podcasts from your device.
• Performance and stability improvements to Safari.
• Handy option to turn text auto-correction on and off from the Keyboard Settings.
• Now pressing the Home button from many Home screen takes you to the first Home screen.
• Decrease in call setup failures and dropped calls.
• Better sound quality of Visual Voicemail messages