Apple has just released iOS 5 beta 2 (build 9A5248d) to developers via iPhone Dev Center. iOS beta 2 is available to download for iPhone 4 (GSM/CDMA), 3GS, iPad 2 (WiFi/GSM/CDMA), iPad, iPod Touch 4G, 3G and Apple TV 2G. iOS 5 beta 1 was released earlier this month at WWDC 2011. iOS 5 beta 2 firmware update includes minor bug fixes and improved battery life on all iDevices.

Update : iOS 5 beta 2 can be jailbroken successfully but can't be unlocked using ultrasnow tool.