sn0wbreeze has been updated (2.8 Beta 1) to support iOS 5 (GSM and CDMA). Recently, MuscleNerd stated that a beta version of redsn0w was available for users and developers to test out applications/tweaks in the iOS 5 environment. One of the main limitations though is that the redsn0w beta is only available for the Mac OS.

Although MuscleNerd said a Windows client was in the process, another prominent developer stepped up to the plate and completed the task. iH8sn0w (@iH8sn0w) pushed out a sn0wbreeze 2.8 Beta 1 release today to ensure that those on Windows could test iOS 5 on a jailbroken device (GSM and CDMA). It is available for all devices except the iPad 2.

This is a huge plus for Windows users and developers/hackers that don't use the Mac OS. iH8snow mentioned to me on Skype that he will continue to release versions of sn0wbreeze for every iOS 5 beta release (Beta 2 - x). On top of this, at the release of iOS 5, sn0wbreeze will be updated to 3.0 and will support all respective devices except the iPad 2.

Here's a disclaimer and information directly from iH8snow:

sn0wbreeze v2.8 BETA 1 Release Notes:
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* Supports iOS 5.0 BETA 1 (9A5220p)
* Supports the following Devices:

- iPhone 3GS
- iPhone 4 [GSM]
- iPhone 4 [CDMA]
- iPod Touch 3G
- iPod Touch 4
- iPad 1G
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* Props to @MuscleNerd for the kernel patches.
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* THIS IS INTENDED FOR DEVELOPERS ONLY!!!
* This sn0wbreeze does NOT add afc2 or Hacktivate to prevent users from removing the UDID check after jailbreak.
* UNLOCKERS SHOULD STAY AWAY!!!
* This is a /TETHERED/ jailbreak via iBooty.
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Now available at: http://ih8sn0w.com/sb28b1