Windows users can jailbreak their iPhone, iPad or iPod touch running iOS 5 beta 6. An updated version of Sn0wbreeze for Windows now supports the latest version of iOS 5 and can jailbreak your iPhone without compromising the baseband.
The tethered jailbreak supports the iPhone 3GS (with new bootrom), iPhone 4 (GSM/CDMA), iPod touch (3G/4) and the first generation iPad. If you're a developer running iOS 5 beta 6 and want to keep you jailbreak intact, you can download Sn0wbreeze 2.8b6 here and follow the instructions from Redmond Pie