This version of Sn0wbreeze can also remove Beta expiry timer (by default, Beta 7 expires on October 20th) set by Apple, and UDID check so that those of you without Apple Developer account can install iOS 5 Beta 7 on any iPhone, iPad and iPod touch.

Change log of Sn0wbreeze 2.8b7 for Windows is as follows:

sn0wbreeze v2.8b7 Release Notes
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* Now jailbreaks iOS 5 beta 7.
* Still removes UDID Developer check + Beta timer.
* Still has the ability to hacktivate.
* Still preserves the baseband (as always!).
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Supported Devices and Tethered?
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* iPhone 3GS (old bootrom)..NO
* iPhone 3GS (new bootrom).YES
* iPhone 4 (GSM)..YES
* iPhone 4 (CDMA).YES
* iPod Touch 3GYES
* iPod Touch 4.YES
* iPad 1GYES
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** REMEMBER TO BOOT WITH "iBooty" **

Download Sn0wbreeze 2.b7 from- here